| 1 |
In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to: |
- A. Infinite energy
- B. Maximum energy
- C. Minimum energy
- D. Zero energy
|
| 2 |
If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of. |
- A. 3.40 eV
- B. 10.20 eV
- C. 13.6 eV
- D. 3.8 eV
|
| 3 |
Laser can be made by creating. |
- A. Meta stable
- B. Population inversion
- C. Excited state
- D. All of these
|
| 4 |
The Balmer series is obtained when all the transition of electrons terminate on |
- A. 1<sup>st</sup> orbit
- B. 2nd orbit
- C. 3rd orbit
- D. 4th orbit
|
| 5 |
Laser is a device which can produce: |
- A. Intense beam of light
- B. Coherant beam of light
- C. Monochromatic beam of light
- D. All of the above
|
| 6 |
The radius of 10th orbit in hydrogen atom is. |
- A. 0.053 nm
- B. 0.53 nm
- C. 5.3 nm
- D. 53 nm
|
| 7 |
The following gas was identified in the sun using spectroscopy |
- A. Hydrogen
- B. Helium
- C. Carbon
- D. Nitrogen
|
| 8 |
Black Body radiation spectrum is an example of: |
- A. Atomic spectra
- B. Line spectra
- C. Continuous spectra
- D. None of above
|
| 9 |
Energy produced due to fission of uranium atom is: |
- A. 500MeV
- B. 200MeV
- C. 700MeV
- D. 750MEV
|
| 10 |
If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be |
- A. 136.0 volt
- B. 3.0 volt
- C. 13.6 volt
- D. None of these
|
