MCQ Atoms and Molecules Chapter 3 Class 9 Science

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MCQ’s For All Chapters – Science Class 9th

1. The term Parmanu was first used by

Question 1 of 20

2. The Greek philosopher who called smallest particles atoms was

Question 2 of 20

3. Antoine Lavoisier is known for establishing

Question 3 of 20

4. Law of Conservation of Mass was established by

Question 4 of 20

5. The Law of Constant Proportions was stated by

Question 5 of 20

6. According to the Law of Constant Proportions, elements in a compound are present

Question 6 of 20

7. Water always contains hydrogen and oxygen in the mass ratio of

Question 7 of 20

8. Dalton’s atomic theory explains

Question 8 of 20

9. Atoms are

Question 9 of 20

10. Dalton’s theory stated that atoms of the same element are

Question 10 of 20

11. The smallest particle of matter that takes part in chemical reactions is

Question 11 of 20

12. The unit used to measure atomic radius is

Question 12 of 20

13. 1 nm equals

Question 13 of 20

14. The symbol of Iron is derived from its Latin name

Question 14 of 20

15. The Latin name of sodium is

Question 15 of 20

16. The Latin name of potassium is

Question 16 of 20

17. The atomic mass unit is based on

Question 17 of 20

18. Relative atomic mass is the mass of an atom compared to

Question 18 of 20

19. The atomic mass of oxygen is

Question 19 of 20

20. The atomic mass of sodium is

Question 20 of 20


 

Comments

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    July 9, 2025 at 5:39 pm

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    Reply
  2. VANSH MAURYA says:
    June 2, 2025 at 2:40 am

    good questions which enhance our knowledge

    Reply
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    October 18, 2024 at 12:35 pm

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  5. Lallu says:
    September 8, 2024 at 4:37 pm

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  6. Ayush kumar says:
    August 27, 2024 at 2:16 pm

    It is very good app for class 9 students

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  7. Arohan saikia says:
    August 15, 2023 at 3:24 am

    Thank you for the MCQs

    Reply

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