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Class 9 Chemistry Chapter 2 MCQs Notes
| Post Topic | MCQs Notes |
| Book Code | Chemistry |
| Class | 9th Class |
| Chapter/Full | Chapter 2 |
| Board | Punjab Board |
9th Class Chemistry Chapter 2 Structure of Atoms MCQs Notes
1: Which one of the following results in the discovery of proton
(a) cathode rays
(b) canal rays
(c) X-rays
(d) alpha rays
2: Which one of the following is the most penetrating.
(a) protons
(b) electrons
(c) neutrons
(d) alpha particles
3: The concept of orbit was used by
(a) J. J. Thomson
(b) Rutherford
(c) Bohr
(d) Planck
4: Which one of the following shells consists of three subshells?
(a) O shell
(b) N shell
(c) L shell
(d) M shell
5: Which radioisotope is used for the diagnosis of tumors in the body?
(a) cobalt-60
(b) iodine-131
(c) strontium-90
(d) phosphorus-30
6: When U-235 breaks up, it produces:
(a) electrons
(b) neutrons
(c) protons
(d) nothing
7: The p subshell has:
(a) one orbital
(b) two orbitals
(c) three orbitals
(d) four orbitals
8: Deuterium is used to make:
(a) light water
(b) heavy water
(c) soft water
(d) hard water
9: The isotope C-12 is present in the abundance of:
(a) 96.9 %
(b) 97.6 %
(c) 99.7 %
(d) none of these
10: Who discovered the proton:
(a) Goldstein
(b) J. J. Thomson
(c) Neil Bohr
(d) Rutherford
Chemistry Chapter 2 MCQs PDF Download
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