| 1 |
The p subshell has:<br> |
- A. one orbital <br>
- B. two orbitals <br>
- C. three orbitals <br>
- D. four orbitals<br>
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| 2 |
Which of the following result in discovery of proton?<br> |
- A. cathode rays<br>
- B. canal rays <br>
- C. x-rays <br>
- D. alpha rays<br>
|
| 3 |
The lowest energy level is |
|
| 4 |
The number of isotopes of carbon are |
|
| 5 |
Half life of C-14 ________________ years. |
- A. 5800
- B. 5700
- C. 5600
- D. 5500
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| 6 |
Cathode rays are actually |
- A. Electrons
- B. Protons
- C. Neutrons
- D. Photons
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| 7 |
In a discharge tube, the pressure of a gas is kept at |
- A. 10-2 atm
- B. 10-4 atm
- C. 10-6 atm
- D. 10-8 atm
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| 8 |
The isotopes C-12 is present in abundance of:<br> |
- A. 96.6%
- B. 97.6%
- C. 99.7%
- D. None of these<br>
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| 9 |
Which one of the following shell consists of three subshells?<br> |
- A. K- shell<br>
- B. M-Shell <br>
- C. L-shell<br>
- D. M-shell<br>
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| 10 |
Which of the following can accommodate 18 electrons? |
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