Free Download CBSE NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Page 32 or Page 33 or Page 35 or Page 39 or Page 40 or Page 42 or Exercises in English Medium or पेज 36 के उत्तर or पेज 40 के उत्तर or पेज 44 के उत्तर or पेज 46 के उत्तर or पेज 48 के उत्तर or अभ्यास के प्रश्न उत्तर to study online or in PDF form to use offline. Download NCERT Solutions and NCERT Solutions Apps for other subjects are also in same format.
| Class: | 9 |
| Subject: | Science – विज्ञान |
| Chapter: | Atoms and Molecules |
CBSE NCERT Solutions for Class 9 Science Chapter 3
English Medium Downloads
- Page 32
- Page 33
- Page 35
- Page 39
- Page 40
- Page 42
- Exercises
- NCERT Book in English Medium
- Study Material in English Medium
Hindi Medium Downloads
Previous Years Questions
Page 32 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 32 are given below. For other questions visit Page 33 or Page 35 or Page 39 or Page 40 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Page 33 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 33 are given below. For other questions visit Page 32 or Page 35 or Page 39 or Page 40 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Page 35 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 35 are given below. For other questions visit Page 32 or Page 33 or Page 39 or Page 40 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Page 39 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 39 are given below. For other questions visit Page 32 or Page 33 or Page 35 or Page 40 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Page 40 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 40 are given below. For other questions visit Page 32 or Page 33 or Page 35 or Page 39 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Page 42 Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions of page 42 are given below. For other questions visit Page 32 or Page 33 or Page 35 or Page 39 or Page 40 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Exercises Questions Answers
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Chapter end Exercises questions are given below. For other questions visit Page 32 or Page 33 or Page 35 or Page 39 or Page 40 or Page 42 or Exercises in English or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
पेज 36 के उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions पेज 36 के उत्तर नीचे दिए गए हैं. For other questions visit पेज 40 के उत्तर or पेज 44 के उत्तर or पेज 46 के उत्तर or पेज 48 के उत्तर or अभ्यास के प्रश्न उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
पेज 40 के उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions पेज 40 के उत्तर नीचे दिए गए हैं. For other questions visit पेज 36 के उत्तर or पेज 44 के उत्तर or पेज 46 के उत्तर or पेज 48 के उत्तर or अभ्यास के प्रश्न उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
पेज 44 के उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions पेज 44 के उत्तर नीचे दिए गए हैं. For other questions visit पेज 36 के उत्तर or पेज 40 के उत्तर or पेज 46 के उत्तर or पेज 48 के उत्तर or अभ्यास के प्रश्न उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
पेज 46 के उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions पेज 46 के उत्तर नीचे दिए गए हैं. For other questions visit पेज 36 के उत्तर or पेज 40 के उत्तर or पेज 44 के उत्तर or पेज 48 के उत्तर or अभ्यास के प्रश्न उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
पेज 48 के उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules Intext questions पेज 48 के उत्तर नीचे दिए गए हैं. For other questions visit पेज 36 के उत्तर or पेज 40 के उत्तर or पेज 44 के उत्तर or पेज 46 के उत्तर or अभ्यास के प्रश्न उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
अभ्यास के प्रश्न उत्तर
NCERT Solutions for Class 9 Science Chapter 3 Atoms and Molecules अभ्यास के प्रश्न उत्तर नीचे दिए गए हैं. For other questions visit पेज 36 के उत्तर or पेज 40 के उत्तर or पेज 44 के उत्तर or पेज 46 के उत्तर or पेज 48 के उत्तर or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.
Go back to Class 9 Science main page or move to Top of page
Class 9 Science – Atoms and Molecules
Extra Questions with Answers for Exams
Question 1
In what respect does Dalton’s Atomic theory hold good even today?
Answer 1:
atom has been found to be made up of sub-atomic particles like electrons, protons and neutrons. But it is still the smallest particle of matter which can take can take part in chemical combination.
Question 2:
Why is it necessary to balance a chemical equation?
Answer 2:
A chemical equation has to be balanced in order to satisfy the law of conservation of mass. According to the law, there is no change in mass when the reaction changes into the production. Therefore, the chemical equation has to be balanced.
Question 3:
What is basic different between atoms and molecules?
Answer 3:
Atoms except those of noble or inert gas elements cannot exist of their own. However, all molecules can have independent existence.
Question 4:
Why is a cation so named?
Answer 4:
When electric current is passed through the solution of a salt like sodium chloride (NaCl), the positive ion (Na+) migrates towards cathode (negative electrode). It is therefore, called cation. Remember this:
(i) Positive ion migrating towards cathode on passing electric current is known as cation.
(ii) Negative ion migrating towards anode on passing electric current is known as anion.
More Questions for Practice
Question 1:
The atomic mass of an element is in fraction. What does it means?
Answer 1:
If the atomic mass of an element is in fraction, this means that it is existed in the form of isotopes. The atomic mass is the average atomic mass and it is generally fractional.
Question 2:
Why are chemical reaction according to law of conservation of mass?
Answer 2:
In all chemical reactions, there is only exchange of reactants taking place when products are formed. Since there is no loss or gain of mass, the chemical reactions are according to law of conservation of mass.
Question 3:
Give one limitation of law of constant composition.
Answer 3:
The law of constant composition does not hold when different isotopes of an element take part in the formation of a particular compound. For example,
In carbon dioxide (CO2)
By using C-12 isotopes, the ratio of C : O is 12 : 32.
By using C-14 isotopes, the ratio of C : O is 14 : 32.
This means that the two ratios are not the same.
Question 4:
Out of atoms and molecules which can exist independently?
Answer 4:
Molecules can exist independently. However, the atoms of noble gases (He, Ne, Ar, Kr, Xe) can also exist independently.
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