| 1 |
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>
|
| 2 |
The value of Rydberg constant is |
- A. 1.0974 x 10<sup>7</sup> m<sup>-1</sup>
- B. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup>
- C. 1.0974 x 10<sup>6</sup> m<sup>-1</sup>
- D. 1.0974 x 10<sup>-6</sup> m<sup>-1</sup>
|
| 3 |
A° is the unit of: |
- A. Energy
- B. Length
- C. Nuclear energy
- D. Work
|
| 4 |
The unit of Rh is. |
- A. ms-1
- B. m
- C. m<sup>2</sup>
- D. m<sup>-1</sup>
|
| 5 |
The shortest wave length is Bracket series has wave length. |
- A. 16/Rn
- B. Rn/16
- C. 16 Rn
- D. 4 Rn
|
| 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 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
|
| 8 |
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
|
| 9 |
Laser can be made by creating. |
- A. Meta stable
- B. Population inversion
- C. Excited state
- D. All of these
|
| 10 |
Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be. |
- A. 0.106 nm
- B. 0.212 nm
- C. 0.053 nm
- D. 0.53 x 10<sup><a href="null">-10</a></sup> nm
|
