| 1 |
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
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| 2 |
Quantum number value for 2p sub shell are |
- A. n = 2, I = 1
- B. n = 1, l =1
- C. n = 1, l = 0
- D. n = 2, l = 0
|
| 3 |
Splitting of spectral lines when atoms are subjected to strong electric field is called |
- A. Zeeman effect
- B. Stark effect
- C. Photoelectric effect
- D. Compton effect
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| 4 |
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
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| 5 |
Which one of the following has the same number of electrons as an alpha particle. |
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| 6 |
The atomis radius is of the order of |
- A. 10<sup>-8</sup>cm
- B. 10<sup>8</sup>cm
- C. 10<sup>-12</sup>cm
- D. 10<sup>-10</sup>cm
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| 7 |
Which one of the following orbital will be filled first. |
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| 8 |
Quantum number values for 2p orbitals are. |
- A. n = 2, 1 =1
- B. n =1, 1 = 2
- C. n =1, 1= 0
- D. n = 2, 1 = 0
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| 9 |
De Broglie equation treats electron to be. |
- A. A particle
- B. Wave
- C. Both particle and wave
- D. None of these
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| 10 |
Positive rays were discovered by. |
- A. J.J.Thomson
- B. Goldstein
- C. Ruther ford
- D. William Crookes
|