| 1 |
The 1<sup>st</sup> Bohr atom in the hydrogen atom has radius |
- A. 3.56 x 10<sup>-10</sup> m
- B. 0.053 x 10<sup>-11</sup> m
- C. 0.53 x 10<sup>-11</sup> m
- D. 5.30 x 10<sup>-11</sup> m
|
| 2 |
In according with Bohr's theory the K.E of the electron is equal to: |
- A. ke<sup>2</sup>/2r
- B. Ze<sup>2</sup>/r
- C. Ze<sup>2</sup>/r<sup>2</sup>
- D. Ze<sup>2</sup>/2r<sup>2</sup>
|
| 3 |
The energy of 4th Orbit in hydrogen atom is. |
- A. -2.51 eV
- B. -3.50 eV
- C. -13.60 eV
- D. -0.85 eV
|
| 4 |
1 rem = |
- A. 0.001 SV
- B. 0.01 SV
- C. 0.1 SV
- D. 1.01 SV
|
| 5 |
Photons emitted in inner shell transition are. |
- A. Continuous X -rays
- B. Discontinuous X rays
- C. Characteristic X rays
- D. Energetic X rays
|
| 6 |
The X-rays diffraction with crystal was first studied by |
- A. W.H Bragg
- B. W.L. Bragg
- C. Michelson
- D. None of these
|
| 7 |
Frequency of x-rays depends upon. |
- A. Number of electrons striking target
- B. Accelerating potencial
- C. Nature of the target
- D. Both B and C
|
| 8 |
The line radiations emitted from by hydrogen filled discharge tube can be analyzed into. |
- A. Band spectrum
- B. Line spectrum
- C. Continuous spectrum
- D. Absorption spectrum
|
| 9 |
The radius of hydrogen atom is: |
- A. 0.53A°
- B. 0.053A°
- C. 0.53 x 10<sup>-9</sup>
- D. 0.053 x10<sup>-9</sup>
|
| 10 |
The typical nuclei are less than: |
- A. 10<sup>-16</sup>m
- B. 10<sup>-14</sup>m
- C. 10<sup>-12</sup>m
- D. 10<sup>-10</sup>m
|
