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CBSE Worksheets for Class 9 Chemistry

CBSE Worksheets for Class 9 Chemistry: One of the best teaching strategies employed in most classrooms today is Worksheets. CBSE Class 9 Chemistry Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. So in order to help you with that, we at WorksheetsBuddy have come up with Kendriya Vidyalaya Class 9 Chemistry Worksheets for the students of Class 9. All our CBSE NCERT Class 9 Chemistry practice worksheets are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance. These chapter wise test papers for Class 9 Chemistry will be useful to test your conceptual understanding.

Board: Central Board of Secondary Education(www.cbse.nic.in) Subject: Class 9 Chemistry Number of Worksheets: 30

CBSE Class 9 Chemistry Worksheets PDF

All the CBSE Worksheets for Class 9 Chemistry provided in this page are provided for free which can be downloaded by students, teachers as well as by parents. We have covered all the Class 9 Chemistry important questions and answers in the worksheets which are included in CBSE NCERT Syllabus. Just click on the following link and download the CBSE Class 9 Chemistry Worksheet. CBSE Worksheets for Class 9 Chemistry can also use like assignments for Class 9 Chemistry students.

CBSE Worksheets for Class 9 Chemistry The Matter In Our Surroundings Assignment
CBSE Worksheets for Class 9 Chemistry Atoms and molecules Assignment
CBSE Worksheets for Class 9 Chemistry Atoms and molecules Assignment 2
CBSE Worksheets for Class 9 Chemistry Atoms and molecules Assignment 3
CBSE Worksheets for Class 9 Chemistry Experiments Assignment
CBSE Worksheets for Class 9 Chemistry Is Matter Around Us Pure Assignment 1
CBSE Worksheets for Class 9 Chemistry Is Matter Around Us Pure Assignment 2
CBSE Worksheets for Class 9 Chemistry Matter in Our Sorrounding Assignment 1
CBSE Worksheets for Class 9 Chemistry Matter in Our Sorrounding Assignment 2
CBSE Worksheets for Class 9 Chemistry Matter in Our Sorrounding Assignment 3
CBSE Worksheets for Class 9 Chemistry Structure of Atom Assignment 1
CBSE Worksheets for Class 9 Chemistry Structure of Atom Assignment 2
CBSE Worksheets for Class 9 Chemistry Assignment 1
CBSE Worksheets for Class 9 Chemistry Assignment 2
CBSE Worksheets for Class 9 Chemistry Assignment 3
CBSE Worksheets for Class 9 Chemistry Assignment 4
CBSE Worksheets for Class 9 Chemistry Assignment 5
CBSE Worksheets for Class 9 Chemistry Assignment 6
CBSE Worksheets for Class 9 Chemistry Assignment 7
CBSE Worksheets for Class 9 Chemistry Assignment 8
CBSE Worksheets for Class 9 Chemistry Assignment 9
CBSE Worksheets for Class 9 Chemistry Assignment 10
CBSE Worksheets for Class 9 Chemistry Assignment 11
CBSE Worksheets for Class 9 Chemistry Assignment 12
CBSE Worksheets for Class 9 Chemistry Assignment 13
CBSE Worksheets for Class 9 Chemistry Assignment 14
CBSE Worksheets for Class 9 Chemistry Assignment 15
CBSE Worksheets for Class 9 Chemistry Assignment 16
CBSE Worksheets for Class 9 Chemistry Assignment 17
CBSE Worksheets for Class 9 Chemistry Assignment 18

Advantages of CBSE Class 9 Chemistry Worksheets

By practising NCERT CBSE Class 9 Chemistry Worksheet , students can improve their problem solving skills.
Helps to develop the subject knowledge in a simple, fun and interactive way.
No need for tuition or attend extra classes if students practise on worksheets daily.
Working on CBSE worksheets are time-saving.
Helps students to promote hands-on learning.
One of the helpful resources used in classroom revision.
CBSE Class 9 Chemistry Workbook Helps to improve subject-knowledge.
CBSE Class 9 Chemistry Worksheets encourages classroom activities.

Worksheets of CBSE Class 9 Chemistry are devised by experts of WorksheetsBuddy experts who have great experience and expertise in teaching Maths. So practising these worksheets will promote students problem-solving skills and subject knowledge in an interactive method. Students can also download CBSE Class 9 Chemistry Chapter wise question bank pdf and access it anytime, anywhere for free. Browse further to download free CBSE Class 9 Chemistry Worksheets PDF .

Now that you are provided all the necessary information regarding CBSE Class 9 Chemistry Worksheet and we hope this detailed article is helpful. So Students who are preparing for the exams must need to have great solving skills. And in order to have these skills, one must practice enough of Class 9 Chemistry revision worksheets . And more importantly, students should need to follow through the worksheets after completing their syllabus. Working on CBSE Class 9 Chemistry Worksheets will be a great help to secure good marks in the examination. So start working on Class 9 Chemistry Worksheets to secure good score.

CBSE Worksheets For Class 9

Assignments For Class 9 Chemistry

Assignments for Class 9 Chemistry have been developed for Standard 9 students based on the latest syllabus and textbooks applicable in CBSE, NCERT and KVS schools. Parents and students can download the full collection of class assignments for class 9 Chemistry from our website as we have provided all topic wise assignments free in PDF format which can be downloaded easily. Students are recommended to do these assignments daily by taking printouts and going through the questions and answers for Grade 9 Chemistry. You should try to do these test assignments on a daily basis so that you are able to understand the concepts and details of each chapter in your Chemistry book and get good marks in class 9 exams.

Assignments for Class 9 Chemistry as per CBSE NCERT pattern

All students studying in Grade 9 Chemistry should download the assignments provided here and use them for their daily routine practice. This will help them to get better grades in Chemistry exam for standard 9. We have made sure that all topics given in your textbook for Chemistry which is suggested in Class 9 have been covered ad we have made assignments and test papers for all topics which your teacher has been teaching in your class. All chapter wise assignments have been made by our teachers after full research of each important topic in the textbooks so that you have enough questions and their solutions to help them practice so that they are able to get full practice and understanding of all important topics. Our teachers at https://www.assignmentsbag.com have made sure that all test papers have been designed as per CBSE, NCERT and KVS syllabus and examination pattern. These question banks have been recommended in various schools and have supported many students to practice and further enhance their scores in school and have also assisted them to appear in other school level tests and examinations. Its easy to take print of thee assignments as all are available in PDF format.

Some advantages of Free Assignments for Class 9 Chemistry

Solving Assignments for Chemistry Class 9 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
By solving one assignments given in your class by Chemistry teacher for class 9 will help you to keep in touch with the topic thus reducing dependence on last minute studies
You will be able to understand the type of questions which are expected in your Chemistry class test
You will be able to revise all topics given in the ebook for Class 9 Chemistry as all questions have been provided in the question banks
NCERT Class 9 Chemistry Workbooks will surely help you to make your concepts stronger and better than anyone else in your class.
Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 9 Chemistry teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Class 9 Chemistry Assignments PDF.

You can download free assignments for class 9 Chemistry from https://www.assignmentsbag.com

You can get free PDF downloadable assignments for Grade 9 Chemistry from our website which has been developed by teachers after doing extensive research in each topic.

On our website we have provided assignments for all subjects in Grade 9, all topic wise test sheets have been provided in a logical manner so that you can scroll through the topics and download the worksheet that you want.

You can easily get question banks, topic wise notes and questions and other useful study material from https://www.assignmentsbag.com without any charge

Yes all test papers for Chemistry Class 9 are available for free, no charge has been put so that the students can benefit from it. And offcourse all is available for download in PDF format and with a single click you can download all assignments.

https://www.assignmentsbag.com is the best portal to download all assignments for all classes without any charges.

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NCERT Solutions For class 9 Science
NCERT Solutions

NCERT Solutions for Class 9 Science - Free PDF Download

Class 9 Science is definitely more extensive than what students studied in the previous class. It also forms a foundation for everything that is yet to come in the higher chapter, therefore, paying complete attention and understanding each topic thoroughly is essential. While some students find Science difficult, some find it easy. However, to make it easy, understanding the subject is very important and this can be accomplished with the help of NCERT Solutions.

For students in Class 9, NCERT Solutions Class 9 Science is a great book to refer to. The Class 9 Science Solutions are available chapter-wise at Vedantu and can prove to be very useful for the students. Whether you are struggling to grasp the concepts of various topics in the chapters or willing to push yourself to score better in the exams, NCERT Solutions for Class 9 Science PDF is the answer for you. These solutions are provided in an easy-to-understand language and will promote self-learning among students. Class 9 Science consists of Physics, Chemistry, and Biology. It is important for students to understand all the concepts available in these subjects to score well. Through these, students will be able to get solutions for questions that they get stuck in. Students need to know that they should prepare for all chemistry formulas and Biology diagrams to do well.

The CBSE Class 9 Science Solutions , available for all the chapters, encourage a spirit of learning among students. What is even better is that students can learn all the chapters by following the NCERT Science Class 9 Solutions without even having to step out of their homes. NCERT Solutions for Class 9 Science are written by subject experts which in turn will help students to understand the chapters better. Students must focus on all the important concepts and topics available in NCERT Solutions . This will even help students to clear all their doubts in an efficient way and score well in their final examinations.

NCERT Solutions for CBSE Class 9 Science consists of solutions from important concepts and topics such as Natural Resources, Sound, Energy and Work, Gravitation, Laws of Motion, Motion, Living Organism, Tissues, Atoms, Matter, and so on. Apart from getting answers for these topics, students can even access all the extra questions, important questions, exemplar problems, previous year’s question papers, worksheets, sample papers, short answer questions, MCQs, HOTs questions, descriptive type questions, and others. There are even tricks and tips that students can look at to see how to do well and score well in their final examinations.

Vedantu provides the downloadable PDF of NCERT Solutions for Class 9 Science absolutely free of cost. All you need to do is register on the site and download the file. At Vedantu, these solutions are designed by subject matter experts who have immense knowledge and experience. These are designed as per the latest NCERT guidelines and exam pattern to make it a reliable material for exam preparation. Students can also Download NCERT Solutions for Class 9 Maths to revise the complete syllabus and do well in the exams.

NCERT Class 9 Science Solutions can be found in a particular format to make it easier for students to access the chapters accordingly. These chapters are important for students to prepare for their examinations as well as to help them create a basic foundation for further studies. The solutions will even help students to do their assignments and score well. Given below are all the chapters that students must learn and understand in order for them to do well.

Detailed Overview of Class 9 Science NCERT Solutions

Overview of ncert solutions class 9 science.

For the students of Class 9 Science, it is really important to gain a proper conceptual foundation of the topics and chapters in the syllabus. The chapters included in the Class 9 Science textbook provide detailed insights into different scientific concepts, laws, processes, etc. Students can learn about different states of matter around us, atoms and molecules, the structure of an atom, the fundamental unit of life and much more. They will gain an understanding of different topics including motion, force, laws of motion, gravitation, energy, work, sound, etc. These topics will not only introduce them to new scientific principles but also help them progress in their higher studies. Students can take help from the 9th Science Guide to delve deeper into the topics and improve their knowledge.

The NCERT solutions for Class 9 Science prove to be excellent study materials for the students as they can understand the topics clearly and efficiently. They can practise solving the questions provided in the NCERT solutions and improve their answering skills in the best way. Doing that will enable the students to complete their syllabus ahead of time, leaving them some time to revise the chapters as well.

NCERT Solutions for Class 9 Science - Chapter-Wise List

Given below are the chapter-wise NCERT Solutions for Class 9 Science . These solutions are provided by the Science experts at Vedantu in a detailed manner. Go through these chapter-wise solutions to be thoroughly familiar with the concepts.

Know about: How do I score good marks in NCERT science class 9?

NCERT Class 9 Science Solutions - Chapter wise Free PDF Download

NCERT Solutions for Class 9 Science – Free PDF Download

Class 9 NCERT Solutions are important for students preparing for the class 9 Science examinations. Some of the features of NCERT 9 Class Science Book Solutions include:

It consists of all the answers and questions available in the Class 9 NCERT textbook

Apart from containing all NCERT Solutions , it covers exemplar problems, extra questions, sample papers, important questions from previous year’s question papers, MCQs, worksheets, HOTs questions, descriptive type questions, short answering questions, and finally tricks and tips of answering questions

Students can opt for NCERT 9th class Science book solutions PDF free download . This ensures that the book is easily accessible to students at any time

To help students understand all the concepts and topics better, NCERT Solutions for Class 9 CBSE consists of diagrams. This even helps students to visualize the topics and learn them quickly.

NCERT Solutions for Class 9 comprise the most effective solutions that are available to help students to score well in their examinations.

The entire NCERT Science Class 9 Solutions can be availed free of cost at Vedantu. These solutions have been drafted as per the latest guidelines issued by the CBSE . To download the NCERT Solutions for Class 9 Science for a chapter, all you are required to do is click on the link of the particular chapter. The basic concept regarding the chapter is explained online by our experts in a Step-by-Step manner that can be easily understood by you.

The NCERT Class 9 Science solutions chapters will not only help you to understand the basic concepts but will definitely enable you to score more in your examination. All these chapters will help you achieve a more fundamental and in-depth understanding of Science and reinforce your knowledge of the subject.

It is very important to have a good understanding of the basic concepts such as work and energy, Structure of the Atom, Gravitation, Force and Laws of Motion etc. of Science-based subjects like Chemistry, Physics and Biology. NCERT Solutions for Class 9 Science includes solutions of all exercises given in the chapters according to CBSE Syllabus for you. When you are in doubt regarding any of the chapters in your CBSE NCERT Science book Class 9 , the NCERT Solutions Science Class 9 is of great help indeed. It helps you understand the concepts in a manner that virtually forms a picture in your mind and consequently builds up your confidence in the subject.

Explained in a logical manner, the Science NCERT Solutions Class 9 provides apt solutions for the chapters. Solutions of Various chapters are provided in great detail. Once you click on a particular chapter, you will be able to find the link to the solutions of the particular chapter. You can click on the particular chapter and visit the webpage where you will get to learn about the concepts. Available as a download option, the NCERT Solutions for Class 9 Science comes in very handy. Wait no further and register for the NCERT 9th class Science book solutions PDF free download for absolutely free of cost.

NCERT Solutions also has important questions that you can access which will help you score well in your examination. These solutions will help you to understand the CBSE NCERT Class 9 Science syllabus better. You will be able to tackle complex concepts and topics with the help of the NCERT Solutions PDF . The study materials are the ideal book that you can use for you to do well in your examinations. All the problems and solutions are explained in a step by step manner to further help you understand the topics. Concepts such as Tissues, Living Life Forms, Force, Movement, Laws of Movement, Energy, Attraction, Work, Sound. Normal Assets and so on are important for you to learn and understand in order for you to score well in your examination.

There are a total of 15 chapters that are available in the NCERT Solutions for Class 9 Science . Students can access these solutions that are written by subject experts to gain a better understanding of all the concepts and topics. Class 9 Science is an important subject for students to create a base of fundamental concepts. This will help them to score well in their examinations as well as help them do better in their higher classes. The solutions consist of explanations that are written in detail in a simple and easy-going language. This in turn will help students to score well in their annual examinations. Below given are the chapter-wise details of NCERT solutions Class 9 Science for you so that you can get an idea about the chapter and its free pdf of NCERT Solutions.

NCERT Solutions Chapter 1 Class 9 Science Matter in Our Surroundings

NCERT Class 9 Science Chapter 1 acts as a foundation for the learning of Chemistry in students and thus, requires you to have a thorough understanding. Solutions of intext exercises and end exercises of Matter in Our Surroundings, are explained elaborately in the notes by Vedantu that will help you to understand the basic concepts of Chemistry. This chapter allows you to relate to changes in your everyday life by explaining the changes that occur in the state of matter under the effect of pressure and temperature. All-cause and effect resulting in the change of state of the matter are explained in a very simplified manner for you to understand. Try to go through the text and then attempt to answer the questions.

Among the exercises included in NCERT Solutions for Class 9 Science Chapter, 1 are in text Ex 1, 2, 3, 4 and an exercise at the end. The end exercise of Chapter 1 has 9 questions in total. Most of the questions are application based and a few are memory-based questions to test your application skills and cognizance.

The first chapter in the science textbook of class 9 is Matter in Our Surroundings. Here is the list of important topics that are covered in the chapter:

What is the matter?

Classification

Physical properties of matter

Interchange in states of matter

Latent heat

The process like sublimation and evaporation

Effect of Change of Pressure

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 1 of CBSE Class 9 Science Solutions –

Chapter 1: Important Questions

Chapter 1: Revision Notes

Chapter 1: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure

Chapter 2 of NCERT class 9 Science book solutions is about “Is Matter Around Us Pure?” This chapter has been carried forward from the first chapter and it talks about various methods of separation and physical and chemical changes. The chapter explains the types of mixtures and solutions. There are various experiments conducted to explain various types of components of a solution and mixtures. So after understanding this chapter, you will be able to distinguish matter into mixtures and pure substances. For this chapter also question papers are solved on Vedantu which will help you to prepare better for your exams. Diagrams and flowcharts are given to help you clear your concept regarding this chapter.

Chapter 2 of NCERT Solutions for Class 9 Science includes Ex 1, 2, 3, 4 (intext) and an Exercise at the end which comprises a total of 11 questions. A greater number of questions are practical and application-based which allows you to improve the understanding of the chapter.

Chapter 2 “Is Matter Around Us Pure” covers the following topics:

What are compounds?

Characteristics of compounds

Properties of mixtures

Types of mixtures

Separation of mixture

Suspensions and their types

Colloids and their types

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 2 of CBSE Class 9 Science Solutions –

Chapter 2: Important Questions

Chapter 2: Revision Notes

Chapter 2: NCERT Exemplar Solutions

Class 9 Science NCERT Solutions Chapter 3 Atoms and Molecules

The 3rd chapter of NCERT Solutions Class 9 carries a significant weightage in the examination with a minimum 3-4 questions being asked from this chapter, every year, in most of the school examinations. Chapter 3 discusses Atoms and Molecules and also provides insight into the Mole Concept which is a very essential chapter in Class 11 as well. This is where you can build the foundation of the mole concept. To solve the several numerical based questions on the Mole concept, it is imperative that you have a thorough understanding. You will also get to know laws of chemical combination, symbols of elements etc. The solutions to all the questions have been provided by subject experts at Vedantu along with proper diagrams and illustrations. By going through the text and then referring to these NCERT class 9 Science book solutions, you will be able to form a clear picture of how questions are likely to be asked in the examination.

With 5 intext exercises and one at the end with 11 questions, the exercises of NCERT Class 9 Solutions Science for Chapter 3 are designed to test your application skills as well as cognizance.

Chapter 3 is atoms and molecules. The following topics are covered in the chapter:

Atoms and molecules

Laws of chemical combination

What is an atom?

What is a molecule?

Writing chemical formulae

Molecular mass and mole concept

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 3 of CBSE Class 9 Science Solutions –

Chapter 3: Important Questions

Chapter 3: Revision Notes

Chapter 3: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atoms

Chapter 4 also falls under Chemistry and it is on the “Structure of Atom” . If understood properly, this chapter can prove to be very interesting. For those willing to pursue Science in higher Classes, this chapter can prove to be very beneficial. Vedantu’s experts have provided smart solutions to Chapter 4 of NCERT Solutions Class 9. This chapter involves some basic mathematical calculations and different theories about the structure of atoms which is why it is very scoring. If you can grasp this chapter well, you will be able to score better in the Science paper. To retain all the theories related to atomic structure, keep practising questions from this chapter frequently. This chapter is an important chapter for you from exam perspective also as it includes many important concepts such as Neutrons, Protons, Isotopes, Valency etc.

NCERT Solutions for Class 9 Science Chapter 4 includes Intext Exercise 1, 2, 3, 4, 5, 6, 7 and an End Exercise. It contains a total of 19 questions in its end exercise. This chapter includes application and memory-based questions to test your understanding of the chapter.

The structure of Atoms and molecules covers the following concepts:

Structure of Atom

Charged particles in matter

The models of the structure of an atom

How are electrons distributed in different Orbits (Shells)?

Atomic number and mass number

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 4 of CBSE Class 9 Science Solutions –

Chapter 4: Important Questions

Chapter 4: Revision Notes

Chapter 4: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life

The 5th chapter - The Fundamental Unit of Life is related to Biology and it is the first chapter dealing with Biology in your syllabus. This chapter teaches you about cells. The cell structure is also explained in this chapter. Both animal and plant cells are explained with elaborate diagrams. For this chapter as well, you will get all NCERT Solutions for Class 9 Science on Vedantu.

Chapter 5 of Class 9 Science NCERT Solutions has 3 intexts and one end exercise. The exercise at the end has 11 questions. The questions are based on analysis and memory to test your analytical skills and cognizance.

Cell the basic unit of life covers the concepts of

Cell as a basic unit of life

Prokaryotic and eukaryotic cells

Cell membrane and cell wall

Cell organelles

Cell inclusions

Chloroplast,

Chromosomes' structure and function

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 5 of CBSE Class 9 Science Solutions –

Chapter 5: Important Questions

Chapter 5: Revision Notes

Chapter 5: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 6 Tissues

The 6th chapter in NCERT Solutions Class 9 Science is on Tissues and explanations on the varied tissue types have been provided. Questions from this chapter are often asked in the Olympiad as well. A thorough understanding of this chapter will allow you to form a strong foundational base in Biology along with increasing your scores in final and Olympiad examinations. Differences between animal and plant tissue have been explained with the help of illustrated diagrams for an enhanced understanding.

NCERT Solution Class 9 Science of Chapter 6 includes all intext exercises and end exercises for you.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 6 of CBSE Class 9 Science Solutions –

Chapter 6: Important Questions

Chapter 6: Revision Notes

Chapter 6: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms

Diversity in Living Organisms is the 7th Chapter in NCERT Science Class 9 Solutions . As you look around, you will discover a great deal of diversity among the various living organisms. The hierarchy in the plant and animal kingdoms and the system of classification have been explained in this chapter. How they are different from each other and their ways of life are explained through this chapter.

NCERT Solution Class 9 Science of Chapter 7 includes all Intext exercises 1, 2, 3, 4, 5, 6 and end exercises for you. The end exercise includes solutions to all 6 questions. These questions are memory-based questions to test your cognizance.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 7 of CBSE Class 9 Science Solutions –

Chapter 7: Important Questions

Chapter 7: Revision Notes

Chapter 7: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 8 Motion

With chapter 8 you will be introduced to Physics. In this chapter, you will learn uniform motion and non-uniform motion. You will also understand the concept of speed and direction of motion. After understanding this chapter, you will be able to understand that all objects on the earth are in motion as the earth is constantly in motion. NCERT Solution Class 9 Science of Chapter 8 includes all Intext exercises 1, 2, 3, 4, 5 and end exercises for you. The end exercise includes a solution of all 10 questions given in your NCERT Textbook. These questions are based on your application skills, numerical skills and memory skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 8 of CBSE Class 9 Science Solutions –

Chapter 8: Important Questions

Chapter 8: Revision Notes

Chapter 8: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion

You have studied the concept of Force in Class 9, now in class 9 you will study it in depth. You will learn about balanced and unbalanced forces. You will understand all three laws of motion and will get to know physicist Galileo Galilei. This chapter will enhance your conceptual understanding of Force and Motion. NCERT Solution Class 9 Science of Chapter 9 includes all Intext exercises 1, 2, 3 and end exercises and additional exercises for you. The end exercise includes a solution of all 18 questions given in your NCERT Textbook . These questions are based on your application skills, numerical skills and memory-skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 9 of CBSE Class 9 Science Solutions –

Chapter 9: Important Questions

Chapter 9: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 10 Gravitation

You must have studied in Class 9 about Newton’s dilemma: why do apples always fall down from the tree? In this chapter of class 9 you will understand more about gravitational force. It is a very important chapter related to Physics. This chapter will give you a vivid idea about how gravitational force works. There are quite a few numericals in this chapter. So, you will require regular practice to score full marks in them. NCERT Solution Class 9 Science of Chapter 10 includes all Intext exercises 1, 2, 3, 4, 5 and end exercise for you. The end exercise includes the solution of all 22 questions given in your NCERT Textbook. These all questions are based on your numerical abilities, application skills, and memory-skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 10 of CBSE Class 9 Science Solutions –

Chapter 10: Important Questions

Chapter 10: Revision Notes

Chapter 10: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 11 Work and Energy

In this chapter you will understand the scientific conception of work and different types of energy. The chapter includes many numericals also so it will require your mathematical skills as well. You need to practice the questions daily. These numericals are really very easy if you understand them and practice them on a daily basis. NCERT Solution Class 9 Science Chapter 11 includes all the 4 Intet and the end exercise, with the answers to all the 21 questions in it. All the questions in the end exercise have been designed to solve your numerical problems solving capabilities and your ability to apply concepts.

NCERT Solutions for Class 9 Science Chapter 12 Sound

You must have heard many types of sound and an echo as well. But what about the production of sound and its journey from its source to our ears. This chapter encompasses this journey and explores more concepts such as echo, reverberation, propagation of a sound wave, etc. NCERT Solution Class 9 Science of Chapter 12 includes all Intext exercises and end exercises for you. The end exercise includes the solution of all 22 questions given in your NCERT Textbook. These questions will test your understanding ability and numerical abilities.

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?

In this chapter you will understand the significance of health, acute and chronic diseases, causes of diseases etc. After reading this chapter, you will understand the value of hygiene for our good health. NCERT Solution Class 9 Science of Chapter 13 includes all Intext exercises and end exercise for you. The end exercise includes the solution of all 6 questions given in your NCERT Textbook. These questions will test your understanding ability and memory skills.

NCERT Solutions for Class 9 Science Chapter 14 Natural Resources

In recent years, Chennai, Rajasthan, Bangalore and Qatar have experienced severe scarcity of water. Although one might think of several solutions to this problem, a solution that is both correct and practical can only be achieved by a proper understanding of the natural resources. This chapter will provide you with an in-depth understanding of the various natural resources where you get to learn about the role of the atmosphere in climate control, carbon cycle, nitrogen cycle etc. All the intext exercises along with an end exercise have been included in the NCERT Solution Class 9 Science of Chapter 14 . Solutions to all the 6 questions of the end exercise in the N CERT Textbook have been provided. The questions adjudge your comprehensive ability, analytical and memory skills.

NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources

This chapter provided you with the knowledge of the nutrients supplied by air, water and soil. Insights into crop production and production management, storage of grains, the nutritional value of food, fertilizers, manure, animal husbandry, fish production and practices such as beekeeping are also provided. NCERT Solution Class 9 Science Chapter 15 comprises all the exercises in between the text along with the end exercise which has solutions to all 9 questions from NCERT Textbook that assess your memory and comprehensive ability. To prepare for the exams, make sure to read the chapter thoroughly and practise all the exercise questions. This is sure to help you score better.

Students can download the entire book of NCERT Solutions for Class 9 science in a PDF format. Students can access practice tests and mock tests to further understand the topics and concerts better. Vedantu even provides NCERT Solutions for all classes and subjects including science for classes from 6 to 12. Students can even download assignments, worksheets, notes, and other study materials that they may require to prepare for their examinations. This will ensure that they get a better understanding of all the topics and concepts in this chapter. Students will even access previous year’s question papers and sample papers to look at all the important questions that they might get in their examination. Before accessing NCERT Solutions books , students must know that most of the questions that are asked in the final examination paper for any class are taken in reference from NCERT Solutions.

CBSE 2023-24 Class 9 Science Marking Scheme

Detailed marking scheme of the examination is given below for you so that you can understand on which unit you should focus more to score maximum.

Why Must You Download the NCERT Solutions for Class 9?

The Prime reasons to download the class 9 Science NCERT solutions are-

Available for Free

Vedantu offers NCERT solutions for class 9 Science completely free. Every chapter of the subject authored by a professional is available completely free. If you are wondering whether you will be asked for money during the sign-up or while downloading, then you don't need to worry about It.

Accessible at any Time

Students can access NCERT Solutions offered by Vedantu at any given point of time. Students can open the PDF on any electronic device wherever they are. This PDF will even help students to revise properly.

Carries all Chapters

The NCERT solutions for class 9 Science subjects carry all chapters and each is assessed by subject experts. From Matter Around Us Pure to Structure of the Atom and The Fundamental of the Unit of Life, the solutions carry all chapters essential to cover and study.

Learn to Manage Time

Students usually face issues with time management when it comes to learning and completing the solution. By downloading the solution, you can develop strategies to learn and solve questions. Furthermore, it will also help in overcoming the anxiety of attending the exam.

Proper Explanation

Another major benefit of downloading the solution is each chapter is presented in an explained manner. The in-house subject authors have ensured that various chapters cover complete details to avoid any confusion later. Students who are in class 9 will be able to understand the subject clearly and will find it easy to handle the query.

CBSE Class 9 Science Examination - Preparation Tips

The NCERT Solutions for Science Class 9 contains all the important questions that are available in the NCERT textbook. Most of the questions available in this book can be expected to come in the annual examination. Hence, students should solve all the questions available in the NCERT Solutions book thoroughly in order for them to prepare for their examinations. The solutions provided by Vedantu will help students to ace their examinations with confidence as all the answers are provided in a step by step manner. Once students are able to understand how to answer certain questions and problems, they will be able to answer all the complex and twisted questions in the question paper without any difficulty.

You should go through the NCERT Solutions of Science Class 9 as it will help you to write answers in a concise and precise manner. Going through these chapter-wise solutions will improve your understanding of the concepts and will also boost your confidence, keeping you ready ahead of the crucial CBSE Class 9 Science examination. There are several techniques explained here that you can use for preparing well in Science.

You can always carry a little diary or notebook where you can jot down the crucial formulas/ principles or definitions to be used for particular sections. Note down a few terms and diagrams illustrating the experiments, explaining the important principles. You may also use it for last-minute revision. You need to have a thorough understanding of all the concepts rather than going through each and every word of the text and trying to remember the same. Resolve your doubts, if any, by attending the live classes at Vedantu without any hassles.

You must prepare a study plan as well if you want to do well in your exams. This way you will be able to space out your time and you will understand what topics and concepts you must focus on more. While creating your study plan you must make sure that you give time to yourself to breathe and take some rest. If you sit to study for hours you may get tired easily and your brain won’t be able to retain a lot of information altogether. You should also make sure that you take care of yourself during your examination. You must eat healthy and get sufficient sleep during your exams.

One of the best ways to prepare for your exams would be to practice. You must practice as much as you can. You can solve previous year’s papers, sample papers, and other question banks. This will help you get an idea of the exam pattern and the type of questions that can be asked. You must solve previous year’s question papers which are at least 10 years old. Apart from understanding the question and question paper pattern, you will even be able to manage your time properly. Time management is very important when it comes to writing an exam. You must know which section to pay more attention to and which section you will be able to finish quickly. Practicing with sample papers and other question banks will help you to manage your time accordingly.

Do not make a habit of procrastinating and allow your mind sufficient time to get a grasp of new concepts. Start your preparation early and spare the last few days for exams. Prior to the exams, make sure you have covered all the topics beforehand. Learning new things just before the exams will not be favourable. Also, if you get study leaves before your exams then utilize those days carefully. Make a timetable and chalk out your subjects. Science subjects need more time to practice so allot at least 2-3 hours in a day for Science. Practice the numericals in the first hour and then spend another hour on revision and reading. You should also solve a few questions every day. Try to sit to study as early in the morning as possible when your mind is fresh. This is the time when your mind is the most active. If you have someone at home to help you out with studies, ask him/her to sit with you and check your answers when you solve them. Go through the corrections yourself to know where you went wrong. If you do not have anyone to help you out, try to do it yourself.

You should also understand that referring to NCERT Solutions for Class 9 Science is considered to be sufficient to prepare for your examinations. These solutions are framed by Vedantu keeping in mind the abilities of students. These solutions are provided in detail to help you easily understand all the complex topics and concepts. You can even learn technique and tricks to understand the topics better. In order for you to get an overall idea of the concepts, you must start to prepare for your exam beforehand.

Some Other Vital Suggestions for Studying

Another suggestion to study better is to have group studies. However, for this purpose, you and your group have to be really serious and dedicated. When you study in groups, you help each other to understand topics better. When you try to explain something to your friend, your own concepts are clarified better. This way both you and your friend benefit from a group study session. This is something you should always keep in mind since you have to ensure full utilization of these sessions. This is a good habit to have, particularly before the examinations.

Make a habit of solving question papers from the previous year. This will help you to get a hold of the different topics and question patterns usually followed in the exam. In case you do not have the previous years’ question papers, then get hold of some mock test question papers or sample test papers. Solving them is beneficial as you will be fully prepared with the format. Having a set of formulas ready for revision helps you with solving the sums. When you are revising through chapters that require you to do sums, have a separate notebook for writing down the formula. This book is of great help for last moment revision. You will not have to go through page after page looking for the formulas. All you need to do is open the notebook and check the formulas you need. This will help you stay abreast of the important formulas without having to really fret about finding them all over again in case you forget. A common scenario isn’t it? Well, a little strategy will help you overcome these hurdles with ease.

If you are a student who has problems with maths, you will need to practice a bit more than the others. Your theory should be well-prepared so that you can score better in that part. If you have the fear of mathematics, then make it a point to overcome that fear. Do not worry! Maths is not that difficult! All you have to do is forget the difficulty and practice daily. That is the only mantra behind acing maths. Just wake up in the morning and practice 2-3 sums from each chapter. Read the questions carefully before attempting the problem. Understand what it wants and what is already given. Go ahead with it when you understand the question properly.

One more important tip before exams that one must follow is being less distracted. You may think your guardian is being absolutely ruthless when he/she asks you not to watch TV before exams. But what he/she means is that you should wisely utilize your time and distract your mind. It is very important to get into that mindset of studying before exams. Try not getting disturbed or distracted as your mind needs to be in the right state to help you prepare. Allot a specific time for activities such as watching TV or playing video games. Make a time table for that too. You can study the whole day and have a recess period of 2 hours after studying, preferably at night before you go to bed.

Before you write your exam you must make sure that you do a complete revision at least 3 times. Make sure that you don’t learn any new topics one night before the exam. This will only lead to confusion and you might even forget the other topics and concepts that you learned. You should revise one day before the exam, during the night, and then you can do a quick revision in the morning. With the notes that you have, revising concepts and topics will make it easier for you to do. For Class 9 Science , it is important for you to revise how to draw all the diagrams that are required for the examination. This will help you score better marks.

What Else Should You Know While Preparing?

Eating and sleeping sufficiently before exams are very necessary for your body. Eat your food on time and sleep on time. Do not compromise on sleep or go to bed late just the night before your exam. This can cause severe headaches in the morning, potentially making you fall sick while writing your exam. Take proper food with a balanced diet plan so that both your body and mind are healthy.

Lastly, do not take too much pressure. If you are having a problem with any chapter, just get help from Vedantu. Do not stress too much and take short breaks in between study hours. Sitting for long periods can give you back pain and stress you out. Start with the difficult chapters first and then move on to the chapters you find easy. Keep your notes and books arranged so that you do not have to get up repeatedly. Keep cell phones and video games away from the study table. Anything that distracts you should remain out of your sight.

On the day of the examination, try not to discuss what you learned with your friends. This can lead to further confusion for both you and your friends. The way you may have learned a particular concept could be different as compared to the way your friends may have learned a particular topic. Apart from this you may also get confused as to if you missed any topics while studying or not. But don’t worry, you have given your best in your preparation and you will do well according to how you have studied.

These are tried and tested methods and have yielded results for lakhs of students like you all over the country. So, wishing you all the best for your preparation for the CBSE Class 9 Science examination . We advise you to be positive, confident as well as get the concepts clear for good exam performance and a high score. Also, revise the solutions to past question papers after understanding the content of the relevant chapters.

NCERT Solution for Class 9 Science - PDF Availability

Students can get the NCERT Solutions for Class 9 Science for free which they can download at Vedantu. When it comes to NCERT Solutions for Class 9 Science , Vedantu is the best option available to you. You can get easy online access to step-by-step Science NCERT Solutions Class 9 as PDF Free download format, here. The NCERT Solution can be downloaded absolutely free of cost. Vedantu offers a free PDF for NCERT Solutions for Science Class 9 . Apart from being totally free, the PDF can be accessed anytime as per your convenience and from anywhere and what’s more important is that the solutions are provided and reviewed by experienced teachers with long-standing experience.

All the textbook questions and exercises available in the chapters have been answered by subject experts who have vast experience in this subject. Solving these questions will help students to get a detailed and better understanding of all the concepts and topics effectively. The solutions are provided in a step-by-step manner with diagrams to help students to improve their logical thinking and analytical thinking.

The latest edition of NCERT Solutions for Class 9 Science is available at Vedantu based on the CBSE syllabus which will enhance your ability for exam preparation and the convenient download option makes things more hassle-free. You can now study as per the latest syllabus and get all the necessary study material at your fingertips.

Why Vedantu is Always the Best

Vedantu is a pioneer in online tutoring in India, facilitating LIVE learning for students with more than 500 highly qualified teachers who have already taught more than 40,000 students for a cumulative total of 1 million hours and counting!

Vedantu brings quality education to students throughout the country and abroad, covering more than 1,000 cities in 30+ countries. The unique platform for online tutoring fosters interactive learning and knowledge sharing in a personalized manner between students and the teachers, courtesy individual and group lessons which are imparted seamlessly. Teachers can make use of video, two-way audio and whiteboard solutions for delivering lessons, thereby explaining the terms, concept, and the principles in a manner which will leave a forever mark in the young minds. This will ensure you score high in the examinations. The best news here is that you can get free PDFs of any chapter for any class. This makes the process less time-consuming and hassle-free. You can choose to learn from a place of your convenience.

With Vedantu, students and teachers can interact in real-time. A host of learning solutions, resources and study materials across Standard I to XII for many school boards, as well as competitive examinations, are offered here. This is what makes Vedantu the best among all the online learning platforms. Vedantu offers study (NCERT) solutions which facilitate easier learning for you while helping you prepare better for examinations.

Vedantu provides students with online notes, important questions, NCERT Solutions , previous year’s questions and other question banks, as well as popular textbook solutions. Students can access these through the Vedantu online portal for free. They can even download these notes and questions for free based on their convenience. These will ensure that students score well in their annual exams as well as do well in their assignments. Vedantu even provides online tutoring which will help students to clear all their doubts and ace their exams.

National Council of Education and Research or NCERT , is an independent body established in 1961 by the Government of India to formalize school education and design curriculum for schools across India (including all the CBSE schools). The goal of NCERT is to promote quality learning that is based on comprehensive research in different fields of study. It is recognized globally for its fostering of practical knowledge with a holistic approach.

The 9th Standard is an important year in the lives of the students. All the topics of Maths, Science, English, Hindi and Social Science plays a crucial role in building a foundational base for the subject that is required in higher studies. Science is an integral part of the curriculum and teaches about the human body and its interactions with the surrounding environment, properties of different materials, animal and plant kingdom, etc. The subject incorporates the theories related to human existence and environment and hence, it is one of the most relevant subjects. Students must learn how to write answers in the Class 9 Science examination correctly without making any mistakes.

NCERT Solutions for Class 9 Science helps students to find answers to the textbook problems and clear all their doubts regarding the questions given in the NCERT book. The solutions are given by expert teachers who are well versed in CBSE curriculum and learn how to write answers in the exam that would fetch more marks. Students can take advantage of the well-curated NCERT Solution for all the subjects available on many online educational sites. Referring to the NCERT Solution for Class 9 Science will help students to improve their subject knowledge and marks. Students will feel a boost of confidence to attempt their exam properly. For those willing to form a career in Science, it is important that s/he understands all the concepts in Class 9 Science thoroughly.

CBSE Class 9 Science Chapter-wise NCERT Solutions

CBSE Class 9 Science NCERT Solutions is available in both Hindi and English languages. Students can access both the solutions PDF chapter-wise. Our in-depth understanding of human anatomy and lives around us is based on the understanding of Class 9 Science. The CBSE curriculum of Class 9 Science includes chapters related to all the three major sub-branches of Science i.e. Physics, Chemistry and Biology. Class 9 Science CBSE syllabus includes many topics related to daily life. Students can seek help from chapter-wise NCERT Solutions and prepare for their examination with full vigour. It is important that you download NCERT Solutions for Class 9 Science from genuine sources that include chapter-wise solutions and are available for free download.

The chapter-wise NCERT Solutions for Class 9 Science is extremely helpful in solving textbook problems. Students should first make a habit of understanding the chapters and then refer to the NCERT Solutions if they are having trouble in solving the questions given in the textbook. All these chapters have been designed in a manner that they allow students to build the right foundation for higher classes. Many students find Science an engaging and interesting subject and if you prepare well for the subject, scoring in the Science paper is not that difficult.

NCERT Solutions Class 9 Science offers textbook exercise solutions crafted by subject matter experts who are well versed in NCERT guidelines and CBSE syllabus . Class 9 Science NCERT textbook includes chapters on the matter, laws of nature, resources, human diseases, etc. In chapter 1, 2, 3 and 4, you will get to know in detail about the matter and the atoms and molecules that form the inner constituents of a matter. Chapter 5, 6 ad 7 deals in depth with the human body and what it is formed of including Cells, tissues and other fundamental units of life. Chapter 8, 9, 10 and 11 are physical aspects of nature dealt thoroughly in higher classes during the study of Physics. All these chapters are crucial to understanding the important concepts related to humans and the environment around us.

There are a plethora of advantages of Using NCERT Solution for Class 9 Science . NCERT Solution is the best way to fast track exam preparation and learn for the exam efficiently. These Solutions are designed by the experts and hence, it will boost confidence to deal with any type of questions asked in the final exam. NCERT Solution for Class 9 Science also helps to clear all your subject related doubts and score well in Class 9 CBSE exam .

There are a total of 15 chapters out of which Chapter 7, Chapter 9, Chapter 10, and Chapter 11 are considered to be difficult chapters. Hence, you must focus on these chapters more and try to understand the concepts instead of just memorizing them. There is no shortcut to learn this subject, you need to work hard and believe in yourself.

Why Vedantu

Vedantu is a one-stop destination for accessing all the study materials and expert guidance. The NCERT CBSE Solution for Class 9 Science is a well-created study material for Class 9 students. Vedantu is known to offer 100% authentic and accurate study materials that help students to prepare for the exam. These solutions are provided to students by the subject matter experts who have years of teaching experience. Students will not be required to spend any money if they wish to avail these resources. Be it the sample papers, previous year question papers or textbook solutions, students will be able to download the PDFs for free.

Vedantu caters to the most accurate NCERT Class 9 CBSE Solutions in a free to download PDF format that comprises chapter-wise solutions to the textbook problems. These solutions are available online so that students can access them anytime, anywhere sitting at the comfort of their homes. You can download NCERT Solutions for all the subjects including Maths, English, Social Science, etc.

Since its inception, Vedantu has successfully mentored young students in their academic development. Vedantu has a team of experienced mentors who are passionate about making learning fun and easy for every student. Vedantu believes that learning has to be interesting as well as engaging. Vedantu offers Online LIVE Interactive Classes where students are taught with the help of creative content and fun exercises that keep them engaged. Students can register for Vedantu’s LIVE Interactive session at a very affordable price and clear all their subject-related doubts. All the study materials provided by Vedantu are thoroughly checked by the expert team for quality assurance. These materials are regularly reviewed and updated as per the latest guidelines to avoid any irrelevancy. If you wish to improve your academic performance, think no more and join Vedantu. Download the Vedantu App and avail all of its offerings at the comfort of your home, on your mobile devices.

There are many online educational services that offer Class 9 CBSE NCERT Solution . It is crucial to choose the right online platform that provides 100% accurate NCERT Solutions. Students should make an informed decision regarding the platform they want to choose for procuring all the necessary study materials. Vedantu’s online learning solutions ensure that you can avail the best study materials and expert guidance without travelling far to coaching classes. Get all the necessary assistance whenever you want! You can get all your doubts cleared with the help of the excellent mentoring team by registering with Vedantu. Vedantu is known to provide accurate and reliable NCERT Solution and other study materials to help you prepare for the exam. So, what are you waiting for? Grab your solution and prepare for exams.

Benefits of Downloading 9th Science Book Back Answers

The following are some of the main benefits of downloading NCERT Solutions Class 9 Chapter Wise Solutions.

All the NCERT Solutions for Class 9 have been prepared by experts at Vedantu in an easy-to-understand language. So, students will have no trouble learning the topics and understanding the concept of the chapters.

The Vedantu experts have created all the solutions for NCERT Class 9 Science chapters by following the CBSE guidelines. These solutions have been explained properly, using a step-by-step format. In this way, students will be able to tackle all the difficult questions easily and that too according to CBSE marking scheme.

All the fundamentals have been completely covered in the NCERT solutions. These solutions have been described using the rules, concepts, and principles from the particular chapters. Our experts have actually provided the solutions to make sure that students are able to delve deeper into the subject and get to know the meaning of different laws, processes, and equations.

The syllabus of Class 9 Science is really wide, consisting of many important chapters. These chapters include some advanced concepts that might be difficult for students to understand. So, in case there are any areas where you might have some doubts, NCERT solutions can be your guide. Students can figure out the topics that they need to learn more about and rectify their mistakes by comparing their solutions to the ones provided in the PDF files.

NCERT Science Book Class 9 Solutions PDF Free Download For Better Results

Visit the official website of Vedantu and download the NCERT Solutions for the Class 9 Science textbook chapters. Vedantu is one of the most trusted ed-tech platforms to find the best study materials. Students can use the NCERT Class 9 Science solutions to complete their syllabus and learn about different chapters in the book. They can use these solutions as study materials to boost their exam preparation.

Important Related Links for NCERT Class 9

CBSE Class 9 Revision Notes

NCERT Books for Class 9

Important Questions for CBSE Class 9

NCERT Exemplar Solutions for Class 9

CBSE Class 9 Syllabus

FAQs on NCERT Solutions For class 9 Science

1. How to Prepare for CBSE Class 9 Science?

The best way to evaluate your progress before an exam is solving as many question sets as possible. It will strengthen your knowledge of concepts as well as increase your efficiency in providing prompt answers.

Besides explanations and keys, class 9 NCERT Science solution also comes with practice exercises formulated by learned scholars to help you improvise on your reasoning skills which is very crucial for a subject like Science. You can also refer to NCERT class 9 Science solutions for last minute notes and suggestions.

2. How many chapters are there in the class 9 NCERT solution?

The NCERT solutions for class 9 science carry all 15 chapters. These chapters are framed by Vedantu in-house subject experts, covering all the fundamental concepts that will help in scoring higher marks.

3. Is this solution enough to prepare for the exam?

Yes, the NCERT solutions for class 9 science available in PDF format are enough to prepare for the exam. These solutions are accurate and in detail, prepared according to the CBSE guidelines. Students don't have to worry about the authenticity of the solution.

4. Where can I get the NCERT Solutions for Class 9 Science?

Follow these steps to download the NCERT Solutions for Class 9 Science -

Click on the NCERT Solutions for Class 9 Science Link.

On this page, you will find the chapter-wise NCERT Solutions for Class 9. You can click on the chapter name for which you want the solutions.

On clicking the chapter’s name, you will be redirected to the next page from where you can download the PDF.

5. Are the NCERT Solutions for Class 9 Science sufficient for the exam preparation?

Yes. The NCERT textbook is the best resource for preparing for your Class 9 Science exam. Students should refer to the NCERT Solutions for Class 9 Science to learn all the concepts thoroughly. With these two resources, students can prepare for their exams and score well. They can also refer to other study material and resources available on Vedantu for additional practice and understanding.

6. What is the name of the Class 9 Science book?

The name of the Class 9 Science NCERT textbook is Science Textbook for Class 9. Students can download the Class 9 Science book from Vedantu. They can also download chapter-wise NCERT Solutions for Class 9 Science. They can download several other study materials for all subjects of Class 9, including NCERT Solutions, Chapter PDFs, Reference Books, Revision Notes, and Important Questions. Students can also use Vedantu's app to download the resources. All resources are available free of cost.

7. What is Sol in Chemistry according to the syllabus of Class 9th?

A colloid wherein small solid particles get dispersed in a liquid medium is called sol. An example of sol is an ink and soap solution. It is a heterogeneous mixture wherein one can see suspension easily. It is stable and does not scatter a beam of light. When left undisturbed, the solute particles in a sol will settle down. This concept is from the Chemistry part of Class 9 Science.

8. How many chapters are there in the NCERT Solutions Class 9 Science?

In the Class 9 Science NCERT textbook, there are 15 chapters. These are -

Matter in Our Surroundings

Is Matter Around Us Pure

Atoms and Molecules

Structure of The Atom

The Fundamental Unit of Life

Diversity in Living Organisms

Force and Laws of Motion

Gravitation

Work and Energy

Why Do We Fall ill

Natural Resources

Improvement in Food Resources

NCERT SOLUTIONS FOR CLASS 9

Cbse class 9 study materials, home tuitions in india.

CBSE Class 9 Chemistry Solution,Notes,MCQ,Sample Questions

Atoms and molecules, structure of atom, is matter around us pure, matter in our surroundings.

CBSE NCERT Solutions

NCERT and CBSE Solutions for free

Class 9 Science Assignments

We have provided below free printable Class 9 Science Assignments for Download in PDF. The Assignments have been designed based on the latest NCERT Book for Class 9 Science . These Assignments for Grade 9 Science cover all important topics which can come in your standard 9 tests and examinations. Free printable Assignments for CBSE Class 9 Science , school and class assignments, and practice test papers have been designed by our highly experienced class 9 faculty. You can free download CBSE NCERT printable Assignments for Science Class 9 with solutions and answers. All Assignments and test sheets have been prepared by expert teachers as per the latest Syllabus in Science Class 9. Students can click on the links below and download all Pdf Assignments for Science class 9 for free. All latest Kendriya Vidyalaya Class 9 Science Assignments with Answers and test papers are given below.

Science Class 9 Assignments Pdf Download

We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 9 Science . Students and teachers can download and save all free Science assignments in Pdf for grade 9th. Our expert faculty have covered Class 9 important questions and answers for Science as per the latest syllabus for the current academic year. All test papers and question banks for Class 9 Science and CBSE Assignments for Science Class 9 will be really helpful for standard 9th students to prepare for the class tests and school examinations. Class 9th students can easily free download in Pdf all printable practice worksheets given below.

Topicwise Assignments for Class 9 Science Download in Pdf

Advantages of Class 9 Science Assignments

As we have the best and largest collection of Science assignments for Grade 9, you will be able to easily get full list of solved important questions which can come in your examinations.
Students will be able to go through all important and critical topics given in your CBSE Science textbooks for Class 9 .
All Science assignments for Class 9 have been designed with answers. Students should solve them yourself and then compare with the solutions provided by us.
Class 9 Students studying in per CBSE, NCERT and KVS schools will be able to free download all Science chapter wise worksheets and assignments for free in Pdf
Class 9 Science question bank will help to improve subject understanding which will help to get better rank in exams

Frequently Asked Questions by Class 9 Science students

At https://www.cbsencertsolutions.com, we have provided the biggest database of free assignments for Science Class 9 which you can download in Pdf

We provide here Standard 9 Science chapter-wise assignments which can be easily downloaded in Pdf format for free.

You can click on the links above and get assignments for Science in Grade 9, all topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here topic-wise Science Grade 9 question banks, revision notes and questions for all difficult topics, and other study material.

We have provided the best collection of question bank and practice tests for Class 9 for all subjects. You can download them all and use them offline without the internet.

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Class 9 Chemistry Assignments

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NCERT Books and Solutions for all classes

Assignments Class 9 Chemistry Pdf Download

Students can refer to Assignments for Class 9 Chemistry available for download in Pdf. We have given below links to subject-wise free printable Assignments for Chemistry Class 9 which you can download easily. All assignments have a collection of questions and answers designed for all topics given in your latest NCERT Books for Class 9 Chemistry for the current academic session. All Assignments for Chemistry Grade 9 have been designed by expert faculty members and have been designed based on the type of questions asked in standard 9 class tests and exams. All Free printable Assignments for NCERT CBSE Class 9, practice worksheets, and question banks have been designed to help you understand all concepts properly. Practicing questions given in CBSE NCERT printable assignments for Class 9 with solutions and answers will help you to further improve your understanding. Our faculty have used the latest syllabus for Class 9. You can click on the links below to download all Pdf assignments for class 9 for free. You can get the best collection of Kendriya Vidyalaya Class 9 Chemistry assignments and questions workbooks below.

Class 9 Chemistry Assignments Pdf Download

CBSE NCERT KVS Assignments for Chemistry Class 9 have been provided below covering all chapters given in your CBSE NCERT books. We have provided below a good collection of assignments in Pdf for Chemistry standard 9th covering Class 9 questions and answers for Chemistry . These practice test papers and workbooks with question banks for Class 9 Chemistry Pdf Download and free CBSE Assignments for Class 9 are really beneficial for you and will support in preparing for class tests and exams. Standard 9th students can download in Pdf by clicking on the links below.

Subjectwise Assignments for Class 9 Chemistry

Assignments Class 9 Chemistry Pdf Download

Benefits of Solving Class 9 Chemistry Assignments

The best collection of Grade 9 assignments for Chemistry have been provided below which will help you in getting better marks in class tests and exams.
The solved question for Class 9 Chemistry will help you to gain more confidence to attempt all types of problems in exams
Latest NCERT Books for Class 9 Chemistry have been referred to for designing these assignments
We have provided step by step solutions for all questions in the Class 9 assignments so that you can understand the solutions in detail.
We have provided single click download links to all chapterwise worksheets and assignments in Pdf.
Class 9 practice question banks will support to enhance subject knowledge and therefore help to get better marks in exam

FAQs by Chemistry Students in Class 9

At https://www.ncertbooksolutions.com is the best website that has the biggest collection of free printable assignments for Class 9 Chemistry.

We provide here Standard 9 subject-wise assignments which can be easily downloaded in Pdf format for free. Our teachers have provided these Grade 9 Chemistry test sheets for English given in your books.

You can click on the links above and get assignments for Chemistry in Grade 9, all chapters and topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here subject-wise Grade 9 Chemistry question banks, revision notes and questions for all difficult topics, and other study material. You can download it all without any charge by clicking on the links provided above.

We have provided the best quality question bank for Class 9 for Chemistry available for Pdf Download. You can download them all and use them offline without the internet.

Life Processes Class 10 Science MCQ Questions

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CLASS 9 CHEMISTRY QUESTIONS AND ANSWER

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WHY CHOOSE ENTRANCEI FOR CLASS 9 CHEMISTRY?

Entrancei solutions are point-prepared and implants using the exam point of view. Our solutions make your preparation easier as they are prepared by our academic expert teachers according to the latest CBSE program and NCERT book. Our solution helps you understand the main points and concepts in an understandable language. It covers all the important topics and subtopics in the chapters of class 9 Chemistry and clears all your doubts to make your exam well. All of our solutions are prepared with the latest CBSE curriculum in mind and change from time to time. Our free CBSE Class 9 Chemistry Textbook Solutions strengthen your basic conditions and can help you score more points on the exam. Refer to our textbook solutions at any time while doing your homework or preparing for exams.

HOW TO STUDY CLASS 9 CHEMISTRY?

Chemistry is a subject that needs conceptual understanding. Studying the answer alone does not serve all purposes. So, while solving the most important questions in CBSE class 9, students need to understand the concept. They have to draw the diagram and write the formula where they are needed as they answer. This will help them get more points on the exam. The student must begin solving the most important questions after completing the CBSE Class 9 chemistry subject at least two months before the annual exam. Try asking questions from previous years, test assignments prepared by Entrancei experts.

Frequently Asked Questions

CBSE Class 9 Chemistry Solutions are available to everyone free of charge.
It covers all the exercise issues of the Class 9 textbook.
It consists of additional questions, problem examples, important questions from previous years' questions and examples, spreadsheets, MCQs, short answers to questions, and tips and tricks.
CBSE Class 9 Chemistry Solution files can be downloaded in PDF format for easy access.
Diagrams are included to help students visualize the topics.

Good command of the 9th-class chapters will help you strengthen your foundation and easily understand higher studies for competitions. Class 9 chemistry questions were also asked during the competition, so regularly solves problem-solving skills to solve such boring questions.

Sit down every day for homework because it is part of student's life because it improves their memory and study habits. Read all the points and concepts explained in detail and take notes using these points for examination purposes. Practice with important questions, test the tasks provided by the Entrancei team to get good grades in the exam.

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Chapter 3: Atoms And Molecules

NCERT Solutions for Class 9 Science Chapter 3 - Atoms and Molecules

Ncert solutions for class 9 science chapter 3 – cbse get free pdf.

NCERT Solutions for Class 9 Science Chapter 3 – Atoms and Molecules is a detailed study material prepared by experts. It provides answers to the questions given in the textbook. NCERT Solutions are very helpful for a better understanding of the concepts and self-analysis.

Download Exclusively Curated Chapter Notes for Class 9 Science Chapter – 3 Atoms and Molecules

Download most important questions for class 9 science chapter – 3 atoms and molecules.

Questions from all the topics are covered in the solutions. Everything is presented in a way that students can easily understand. It will help them score well in the CBSE examination. The answers to all kinds of long and short questions, MCQs, tricks and tips are provided in the NCERT Solutions for Class 9 Science . Try solving the questions after completing the entire syllabus and overcoming the shortcomings before the CBSE exams arrive.

The chapter Atoms and Molecules form the basis of the upcoming chapters; therefore, it should be dealt with thoroughly. The questions and solutions will help the students clarify all their doubts related to the topic.

The NCERT Solutions for Class 9 carries all the important questions and answers for all the subjects and chapters. The students can refer to these solutions to excel in the CBSE examinations.

Chapter 1 Matter in Our Surroundings
Chapter 2 Is Matter Around Us Pure
Chapter 4 Structure of the Atom
Chapter 5 The Fundamental Unit of Life
Chapter 6 Tissues
Chapter 7 Diversity in Living Organisms
Chapter 8 Motion
Chapter 9 Force and Laws of Motion
Chapter 10 Gravitation
Chapter 11 Work and Energy
Chapter 12 Sound
Chapter 13 Why Do We Fall Ill
Chapter 14 Natural Resources
Chapter 15 Improvement in Food Resources

NCERT Solutions for Class 9 Science Chapter 3 – Atoms and Molecules

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Access answers of Science NCERT Class 9 Chapter 3 – Atoms and Molecules (All in-text and exercise questions solved)

Class 9 science chapter 3 exercise-3.1 questions with answers, exercise-3.1 page: 32.

1. In a reaction, 5.3g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.

Sodium carbonate + acetic acid → Sodium acetate + carbon dioxide + water

5.3g 6g 8.2g 2.2g 0.9g

As per the law of conservation of mass, the total mass of reactants must be equal to the total mass of

As per the above reaction, L.H.S. = R.H.S. i.e., 5.3g + 6g = 2.2g + 0.9 g + 8.2 g = 11.3 g

Hence, the observations are in agreement with the law of conservation of mass.

2. Hydrogen and oxygen combine in a ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

We know hydrogen and water mix in a ratio 1: 8.

For every 1g of hydrogen, it is 8g of oxygen.

Therefore, for 3g of hydrogen, the quantity of oxygen = 3 x 8 = 24g

Hence, 24g of oxygen would be required for the complete reaction with 3g of hydrogen gas.

3. Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?

The relative number and types of atoms are constant in a given composition, says Dalton’s atomic theory, which is based on the rule of conservation of mass.

“Atoms cannot be created nor be destroyed in a chemical reaction.”

4. Which postulate of Dalton’s atomic theory can explain the law of definite proportions?

The postulate of Dalton’s atomic theory that can explain the law of definite proportions is that the

relative number and kinds of atoms are equal in given compounds.

Exercise-3.2 Page: 35

1. Define the atomic mass unit.

An atomic mass unit is a unit of mass used to express the weights of atoms and molecules where one

atomic mass is equal to 1/12th the mass of one carbon-12 atom.

2. Why is it not possible to see an atom with the naked eyes?

Firstly, atoms are minuscule in nature, measured in nanometers. Secondly, except for atoms of noble

gases, they do not exist independently. Hence, an atom cannot be visible to the naked eyes.

Exercise-3.3-3.4 Page: 39

1. Write down the formulae of

(i) sodium oxide

(ii) aluminium chloride

(iii) sodium sulphide

(iv) magnesium hydroxide

The following are the formulae:

(i) sodium oxide – Na 2 O

(ii) aluminium chloride – AlCl 3

(iii) sodium sulphide – Na 2 S

(iv) magnesium hydroxide – Mg (OH) 2

2. Write down the names of compounds represented by the following formulae:

(i) Al 2 (SO 4 ) 3

(ii) CaCl 2

(iii) K 2 SO 4

(v) CaCO 3 .

Listed below are the names of the compounds for each of the following formulae:

(i) Al 2 (SO 4 ) 3 – Aluminium sulphate

(ii) CaCl 2 – Calcium chloride

(iii) K 2 SO 4 – Potassium sulphate

(iv) KNO 3 – Potassium nitrate

(v) CaCO 3 – Calcium carbonate

3. What is meant by the term chemical formula?

Chemical formulas are used to describe the different types of atoms and their numbers in a compound or element. Each element’s atoms are symbolised by one or two letters. A collection of chemical symbols that depicts the elements that make up a compound and their quantities.

For example, the chemical formula of hydrochloric acid is HCl.

4. How many atoms are present in a

(i) H 2 S molecule and

(ii) PO 4 3- ion?

The number of atoms present is as follows:

(i) H 2 S molecule has 2 atoms of hydrogen and 1 atom of sulphur hence 3 atoms in total.

(ii) PO 4 3- ion has 1 atom of phosphorus and 4 atoms of oxygen hence 5 atoms in total.

Exercise-3.5.1-3.5.2 Page: 40

1. Calculate the molecular masses of H 2 , O 2 , Cl 2 , CO 2 , CH 4 , C 2 H 6 , C 2 H 4 , NH 3 , CH 3 OH.

The following are the molecular masses:

The molecular mass of H 2 – 2 x atoms atomic mass of H = 2 x 1u = 2u

The molecular mass of O 2 – 2 x atoms atomic mass of O = 2 x 16u = 32u

The molecular mass of Cl 2 – 2 x atoms atomic mass of Cl = 2 x 35.5u = 71u

The molecular mass of CO 2 – atomic mass of C + 2 x atomic mass of O = 12 + ( 2×16)u = 44u

The molecular mass of CH 4 – atomic mass of C + 4 x atomic mass of H = 12 + ( 4 x 1)u = 16u

The molecular mass of C 2 H 6 – 2 x atomic mass of C + 6 x atomic mass of H = (2 x 12) +

(6 x 1)u=24+6=30u

The molecular mass of C 2 H 4 – 2 x atomic mass of C + 4 x atomic mass of H = (2x 12) +

(4 x 1)u=24+4=28u

The molecular mass of NH 3 – atomic mass of N + 3 x atomic mass of H = (14 +3 x 1)u= 17u

The molecular mass of CH 3 OH – atomic mass of C + 3x atomic mass of H + atomic mass of O + atomic mass of H = (12 + 3×1+16+1)u=(12+3+17)u = 32u

2. Calculate the formula unit masses of ZnO, Na 2 O, K 2 CO 3 , given atomic masses of Zn = 65u,

Na = 23 u, K=39u, C = 12u, and O=16u.

The atomic mass of Zn = 65u

The atomic mass of Na = 23u

The atomic mass of K = 39u

The atomic mass of C = 12u

The atomic mass of O = 16u

The formula unit mass of ZnO= Atomic mass of Zn + Atomic mass of O = 65u + 16u = 81u

The formula unit mass of Na 2 O = 2 x Atomic mass of Na + Atomic mass of O = (2 x 23)u + 16u = 46u + 16u = 62u

The formula unit mass of K 2 CO 3 = 2 x Atomic mass of K + Atomic mass of C + 3 x Atomic mass of O = (2 x 39)u + 12u + (3 x 16)u = 78u + 12u + 48u = 138u

Exercise-3.5.3 Page: 42

1. If one mole of carbon atoms weighs 12grams, what is the mass (in grams) of 1 atom of carbon?

Given: 1 mole of carbon weighs 12g

1 mole of carbon atoms = 6.022 x 10 23

The molecular mass of carbon atoms = 12g = an atom of carbon mass

Hence, mass of 1 carbon atom = 12 / 6.022 x 10 23 = 1.99 x 10 -23 g

2. Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given the atomic mass of Na = 23u, Fe = 56 u)?

(a) In 100 grams of Na:

m = 100g, Molar mass of Na atom = 23g, N 0 = 6.022 x 10 23 , N = ?

N = (Given mass x N 0 )/Molar mass

N = (100 x 6.022 x 10 23 )/ 23

N = 26.18 x 10 23 atoms

(b) In 100 grams of Fe:

m = 100 g, Molar mass of Fe atom = 56 g, N 0 = 6.022 x 10 23 , N = ?

N = (Given mass x N 0 )/ Molar mass

N = (100 x 6.022 x 10 23 )/ 56

N = 10.75 x 10 23 atoms

Therefore, the number of atoms is more in 100 g of Na than in 100 g of Fe.

Exercise Page: 43

1. A 0.24g sample of a compound of oxygen and boron was found by analysis to contain 0.096g of boron and 0.144g of oxygen. Calculate the percentage composition of the compound by weight.

Given: Mass of the sample compound = 0.24g, mass of boron = 0.096g, mass of oxygen = 0.144g

To calculate the percentage composition of the compound,

Percentage of boron = mass of boron / mass of the compound x 100

= 0.096g / 0.24g x 100 = 40%

Percentage of oxygen = 100 – percentage of boron

= 100 – 40 = 60%

2. When 3.0g of carbon is burnt in 8.00 g of oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combination will govern your answer?

When 3.0 g of carbon is burnt in 8.00 g of oxygen, 11.00 g of carbon dioxide is produced.

3.0 g of carbon combines with 8.0 g of oxygen to give 11.0 of carbon dioxide.

We need to find out the mass of carbon dioxide that will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen.

First, let us write the reaction taking place here.

C + O2 → CO2

As per the given condition, when 3.0 g of carbon is burnt in 8.00 g of oxygen, 11.00 g of carbon dioxide is produced.

3g + 8g →11 g ( from the above reaction)

The total mass of reactants = mass of carbon + mass of oxygen

The total mass of reactants = Total mass of products

Therefore, the law of conservation of mass is proved.

Then, it also depicts that carbon dioxide contains carbon and oxygen in a fixed ratio by mass, which is 3:8.

Thus, it further proves the law of constant proportions.

3 g of carbon must also combine with 8 g of oxygen only.

This means that (50−8)=42g of oxygen will remain unreacted.

The remaining 42 g of oxygen will be left un-reactive. In this case, too, only 11 g of carbon dioxide will be formed

The above answer is governed by the law of constant proportions.

3. What are polyatomic ions? Give examples.

Polyatomic ions are ions that contain more than one atom, but they behave as a single unit.

Example: CO 3 2- , H 2 PO 4 –

4. Write the chemical formula of the following.

(a) Magnesium chloride

(b) Calcium oxide

(d) Aluminium chloride

(e) Calcium carbonate

The following are the chemical formula of the above-mentioned list:

(a) Magnesium chloride – MgCl 2

(b) Calcium oxide – CaO

(d) Aluminium chloride – AlCl 3

(e) Calcium carbonate – CaCO 3

5. Give the names of the elements present in the following compounds.

(a) Quick lime

(b) Hydrogen bromide

(d) Potassium sulphate

The following are the names of the elements present in the following compounds:

(a) Quick lime – Calcium and oxygen (CaO)

(b) Hydrogen bromide – Hydrogen and bromine (HBr)

(d) Potassium sulphate – Sulphur, Oxygen, Potassium (K 2 SO 4 )

6. Calculate the molar mass of the following substances.

(a) Ethyne, C 2 H 2

(b) Sulphur molecule, S 8

(d) Hydrochloric acid, HCl

(e) Nitric acid, HNO 3

Listed below is the molar mass of the following substances:

(a) Molar mass of Ethyne C 2 H 2 = 2 x Mass of C+2 x Mass of H = (2×12)+(2×1)=24+2=26g

(b) Molar mass of Sulphur molecule S 8 = 8 x Mass of S = 8 x 32 = 256g

(d) Molar mass of Hydrochloric acid, HCl = Mass of H+ Mass of Cl = 1+35.5 = 36.5g

(e) Molar mass of Nitric acid, HNO 3 =Mass of H+ Mass of Nitrogen + 3 x Mass of O = 1 + 14+

7. What is the mass of

(a) 1 mole of nitrogen atoms?

(b) 4 moles of aluminium atoms (Atomic mass of aluminium =27)?

The mass of the above-mentioned list is as follows:

(a) Atomic mass of nitrogen atoms = 14u

Mass of 1 mole of nitrogen atoms = Atomic mass of nitrogen atoms

Therefore, the mass of 1 mole of nitrogen atom is 14g.

(b) Atomic mass of aluminium =27u

Mass of 1 mole of aluminium atoms = 27g

1 mole of aluminium atoms = 27g, 4 moles of aluminium atoms = 4 x 27 = 108g

(c) Mass of 1 mole of sodium sulphite Na 2 SO 3 = Molecular mass of sodium sulphite = 2 x Mass of Na + Mass of S + 3 x Mass of O = (2 x 23) + 32 +(3x 16) = 46+32+48 = 126g

Therefore, mass of 10 moles of Na 2 SO 3 = 10 x 126 = 1260g

8. Convert into a mole.

(a) 12g of oxygen gas

(b) 20g of water

Conversion of the above-mentioned molecules into moles is as follows:

(a) Given: Mass of oxygen gas=12g

Molar mass of oxygen gas = 2 Mass of Oxygen = 2 x 16 = 32g

Number of moles = Mass given / molar mass of oxygen gas = 12/32 = 0.375 moles

(b) Given: Mass of water = 20g

Molar mass of water = 2 x Mass of Hydrogen + Mass of Oxygen = 2 x 1 + 16 = 18g

Number of moles = Mass given / molar mass of water

= 20/18 = 1.11 moles

Molar mass of carbon dioxide = Mass of C + 2 x Mass of Oxygen = 12 + 2x 16 = 12+32=44g

Number of moles = Mass given/ molar mass of carbon dioxide = 22/44 = 0.5 moles

9. What is the mass of:

(a) 0.2 mole of oxygen atoms?

(b) 0.5 mole of water molecules?

The mass is as follows:

(a) Mass of 1 mole of oxygen atoms = 16u; hence, it weighs 16g.

Mass of 0.2 moles of oxygen atoms = 0.2 x 16 = 3.2g

(b) Mass of 1 mole of water molecules = 18u; hence, it weighs 18g.

Mass of 0.5 moles of water molecules = 0.5 x 18 = 9g

10. Calculate the number of molecules of sulphur (S 8 ) present in 16g of solid sulphur.

To calculate the molecular mass of sulphur,

Molecular mass of Sulphur (S 8 ) = 8xMass of Sulphur = 8×32 = 256g

Mass given = 16g

Number of moles = mass given/ molar mass of sulphur

= 16/256 = 0.0625 moles

To calculate the number of molecules of sulphur in 16g of solid sulphur,

Number of molecules = Number of moles x Avogadro number

= 0.0625 x 6.022 x 10²³ molecules

= 3.763 x 10 22 molecules

11. Calculate the number of aluminium ions present in 0.051g of aluminium oxide.

( Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27u)

To calculate the number of aluminium ions in 0.051g of aluminium oxide,

1 mole of aluminium oxide = 6.022 x 10 23 molecules of aluminium oxide

1 mole of aluminium oxide (Al 2 O 3 ) = 2 x Mass of aluminium + 3 x Mass of oxygen

= (2x 27) + (3 x16) = 54 +48 = 102g

1 mole of aluminium oxide = 102g = 6.022 x 10 23 molecules of aluminium oxide

Therefore, 0.051g of aluminium oxide has = 6.022 x 10 23 / 102 x 0.051

= 3.011 x 10 20 molecules of aluminium oxide

One molecule of aluminium oxide has 2 aluminium ions; hence, the number of aluminium ions present in 0.051g of aluminium oxide = 2 x 3.011x 10 20 molecules of aluminium oxide.

= 6.022 x 10 20

The chapter holds a weightage of 23 marks in the examinations. The questions are not specific and can be asked from any topic. The students are therefore advised to be thorough with the entire chapter. The chemical formulae and the numerical should be practised well.

The important topics provided in this chapter include

3.1 Laws of Chemical Combination

3.2 What Is an Atom?

3.3 What Is a Molecule?

3.4 Writing Chemical Formulae

3.5 Molecular Mass and Mole Concept

Exercise Solutions 11 Questions (8 numerical, 3 short)

Molecular mass and Mole concept – 8 numerical

Chemical Formula – 2 Questions

What Is an Atom – 1 Question

NCERT Solutions for Class 9 Science Chapter 3

The smallest unit of matter is an atom. It has the properties of an element. An atom comprises a dense core called a nucleus, surrounded by a series of outer shells. The electrons are present in these shells. The nucleus contains protons and neutrons. Protons have a positive charge, while neutrons are neutral.

Two or more atoms tightly bound together form a molecule. The molecules made up of two atoms are known as diatomic. Oxygen, nitrogen, hydrogen, and iodine are diatomic molecules. Earth’s atmosphere is comprised mainly of diatomic molecules. A molecule is the smallest part of a compound.

Key Features of NCERT Solutions for Class 9 Science Chapter 3 – Atoms and Molecules

The answers are provided by Science experts.
The answers are non-erroneous.
The Solutions have questions from every important topic.
It gives a thorough understanding of the concepts.

Disclaimer:

Dropped Topics – Mole concept.

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Exercise-3.2 Page: 35

Exercise-3.3-3.4 Page: 39

Exercise-3.5.1-3.5.2 Page: 40

Exercise-3.5.3 Page: 42