MCQ Class 9 Science Exploration Chapter 9 Atomic Foundation of Matter

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1. Matter can neither be created nor destroyed in a chemical reaction. What is this law called?

Question 1 of 20

2. Who proposed the Law of Conservation of Mass?

Question 2 of 20

3. In a physical change, mass:

Question 3 of 20

4. Why was mass different in experimental setup 1?

Question 4 of 20

5. In a closed system, mass after reaction is:

Question 5 of 20

6. The Law of Constant Proportions was given by:

Question 6 of 20

7. Water always contains hydrogen and oxygen in ratio:

Question 7 of 20

8. A compound always has:

Question 8 of 20

9. Dalton’s theory states atoms are:

Question 9 of 20

10. Atoms combine in:

Question 10 of 20

11. A molecule is:

Question 11 of 20

12. Helium exists as:

Question 12 of 20

13. Covalent bond is formed by:

Question 13 of 20

14. Ionic bond is formed by:

Question 14 of 20

15. Hydrogen molecule is formed by:

Question 15 of 20

16. Single covalent bond involves:

Question 16 of 20

17. Oxygen molecule has:

Question 17 of 20

18. Chlorine molecule has:

Question 18 of 20

19. HCl is formed by:

Question 19 of 20

20. Water molecule contains:

Question 20 of 20


 

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