| 1 |
The value of Planck's constant is |
- A. 6.63 x 10-34 Js
- B. 6.63 x 10-32 Js
- C. 6.63 x 10-30 Js
- D. 6.63 x 10-28 Js
|
| 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 isotopes of an element have different number of |
- A. Electrons
- B. Protons
- C. Neutrons
- D. Protons & Neutrons
|
| 4 |
Alpha particles are double charged. |
- A. Negative
- B. Positive
- C. Can be both
- D. Nil
|
| 5 |
The number of electrons in K shell of O is ________________ |
|
| 6 |
In 9th century scientist accepted by: |
- A. Dalton
- B. Bohars
- C. Rutherford
- D. Nil
|
| 7 |
First energy level is denoted by:<br> |
- A. K
- B. L <br>
- C. M <br>
- D. N
|
| 8 |
Deuterium is used to make:<br> |
- A. light water <br>
- B. heavy water<br>
- C. soft water<br>
- D. hard water<br>
|
| 9 |
Atoms of elements combine chemically to form:<br> |
- A. Mixtures<br>
- B. compounds<br>
- C. solutions <br>
- D. ions<br>
|
| 10 |
In ________________ Rutherford's was studying radiations. |
- A. 1911
- B. 1931
- C. 1921
- D. 1922
|
