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MCQ Model of An Atom Chapter 4 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. Which of the following scientist discovered neutrons?

Your comments:

Question 1 of 24

2. A glass rod gets electrically charged on rubbing with silk cloth. What's the source of this charge?

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Question 2 of 24

3. The proton has a charge equal in magnitude but opposite in sign to that of:

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Question 3 of 24

4. What is the other name for anode rays?

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Question 4 of 24

5. Which scientist discovered the anode rays?

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Question 5 of 24

6. Which of the following gases do not have neutron in the nucleus of their atoms?

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Question 6 of 24

7. Which of the following is not true for cathode rays?

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Question 7 of 24

8. What will be the net charge on the atom if it contains one electron and one proton?

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Question 8 of 24

9. According to J.J Thomson, an atom is a positively charged sphere. Which sub-atomic particles is embedded in it?

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Question 9 of 24

10. The following picture represents which model of an atom?

download (5)

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Question 10 of 24

11. The canal rays led to the discovery of which subatomic particle?

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Question 11 of 24

12. Which of the following is not a part of J. J. Thomson’s atomic model?

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Question 12 of 24

13. Select the sub-atomic particles that are present in the nucleus of an atom.

A. Electrons
B. Protons
C. Neutrons

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Question 13 of 24

14. Thomson proposed the model of an atom to be similar to that of a:

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Question 14 of 24

15. What are the essential conditions for the production of anode rays?

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Question 15 of 24

16. What is the charge of a proton in coulombs?
3

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Question 16 of 24

17. The mass of an electron is approximately 1/2000 times that of:

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Question 17 of 24

18. Electron is represented as:

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Question 18 of 24

19. The lightest positively charged particles are formed from:

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Question 19 of 24

20. What is the charge on an electron?

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Question 20 of 24

21. ASSERTION-No. of electrons always equal to the proton no. of atom.

REASON-atom is always made-up of proton and electron.

Question 21 of 24

22. ASSERTION-No. of electrons always equal to the proton no. of atom.

REASON-Atoms are always made up of proton, electron, and neutron.

Question 22 of 24

23. ASSERION-No. of electrons always equal to the proton no. of atom.

REASON-Same no. of proton and electron present in atom makes it stable.

Question 23 of 24

24. ASSERION-Electrons can easily remove off but not proton.

REASON-Electrons are more delicate than proton.

Question 24 of 24

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