| 1 |
Black Body radiation spectrum is an example of: |
- A. Atomic spectra
- B. Line spectra
- C. Continuous spectra
- D. None of above
|
| 2 |
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
|
| 3 |
X-rays were discovered by |
- A. Curie
- B. Henry Becquerel
- C. Rontgen
- D. None of these
|
| 4 |
Photons emitted in inner shell transition are. |
- A. Continuous X -rays
- B. Discontinuous X rays
- C. Characteristic X rays
- D. Energetic X rays
|
| 5 |
Balmer series lies in region of electromagnetic spectrum. |
- A. Infrared
- B. Visible
- C. Ultraviolet
- D. Fra infrared
|
| 6 |
Bremsstrahlung radiation are examples of |
- A. Atomic spectra
- B. Molecular spectra
- C. Continuous spectra
- D. Discrete spectra
|
| 7 |
If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is: |
- A. 10.2 eV
- B. 0 eV
- C. 3.4 eV
- D. 6.8 eV
|
| 8 |
Which series lies in the ultraviolet region. |
- A. Balmer series
- B. Bracket series
- C. Ptund series
- D. Lyman series
|
| 9 |
Radius of first Bohr's orbit is. |
- A. 0.053 nm
- B. 0.053 mm
- C. 0.053 micro meter
- D. 0.053 m
|
| 10 |
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
|
