Entry Test MCQ :: Atomic Structure
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| 21. |
Increase in atomic number is observed during |
| A. |
Alpha emission |
B. |
Beta emission |
| C. |
Both a & b |
D. |
Radioactivity |
Answer: Option B
Explanation:
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| 22. |
Positive rays give flash on |
| A. |
AgNO3 plate |
B. |
AgCl plate |
| C. |
ZnO |
D. |
ZnS |
Answer: Option D
Explanation:
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| 23. |
Free neutron changes into proton with the emission of |
| A. |
Neutrino |
B. |
Electron |
| C. |
Both a & b |
D. |
Meson |
Answer: Option C
Explanation:
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| 24. |
The value of e/m ratio of electron is |
| A. |
6.02 x 1023 C/kg |
B. |
1.7588 x 1020 C/kg |
| C. |
9.1095 x 10-31 C/kg |
D. |
1.7588 x 1011 C/kg |
Answer: Option D
Explanation:
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| 25. |
Charge of electron was measured by |
| A. |
J.J Thomson |
B. |
Millikan |
| C. |
Rutherford |
D. |
Perrin |
Answer: Option B
Explanation:
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| 26. |
Rutherford bombarded ______________ particles in discovery of nucleus |
| A. |
Gamma-rays |
B. |
Alpha-rays |
| C. |
Beta-rays |
D. |
X-rays |
Answer: Option B
Explanation:
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| 27. |
Planks theory says energy is emitted |
| A. |
In continuous manner |
B. |
Discontinuous manner |
| C. |
Simultaneously |
D. |
In the form of heat |
Answer: Option B
Explanation:
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| 28. |
Angular momentum of an electron |
Answer: Option D
Explanation:
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| 29. |
2nd orbit is _______ away from nucleus of H-atom as compared to 1st orbit is |
| A. |
2-times |
B. |
3-times |
| C. |
4-times |
D. |
6 times |
Answer: Option C
Explanation:
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| 30. |
The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be |
Answer: Option D
Explanation:
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