| 1 |
Which electron traveled more distance, when jump from |
- A. n1 to n2
- B. n2 ato n3
- C. n3 to n2
- D. n3 to n4
|
| 2 |
In the ground state of an atom, the electrons is present. |
- A. In the nucleus
- B. In the second shell
- C. Nearest to the nucleus
- D. Farthest form the nucleus
|
| 3 |
The wave number of the light emitted by a certain source is 2 x 10<sup>6</sup> m-1 . The wavelength of this light will be. |
- A. 500 nm
- B. 5000 nm
- C. 200 nm
- D. 5 x10<sup>7</sup> m
|
| 4 |
Rutherford's model of atom failed because |
- A. The atom did not have a nucleus and electrons
- B. It did not account for the attraction between protons and neutrons
- C. It did not account for the stability of the atom
- D. There is actually no space between the nucleus and the electrons
|
| 5 |
In which de excitation of electron of hydrogen atom maximum energy is relaeased. |
- A. From n2 to n1
- B. From n3 to n2
- C. From na to n1
- D. From na to n2
|
| 6 |
The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in |
- A. Visible region
- B. X-Ray region
- C. I.R region
- D. U.V. region
|
| 7 |
The mass of alpha particle is equal to. |
- A. Four times the mass of one proton
- B. That of one hydrogen atom
- C. That of one electron
- D. That of one proton
|
| 8 |
When 5d orbital is completed them entering electron goes into. |
|
| 9 |
Cathode rays strike alumina and produce a ..........colour. |
- A. Red
- B. Blue
- C. Yellow
- D. Green
|
| 10 |
The value of Rydberg constant is. |
- A. 1.6 x 10<sup>7</sup> m-1
- B. 1.9768 x 10<sup>7</sup> m-1
- C. 1.09678 x 10<sup>7</sup> m-1
- D. 1.7904 x 10<sup>7</sup> m-1
|