| 1 |
The velocity of photon is |
- A. Independent of its wavelength
- B. Depends on its wavelength
- C. Equal to square of its amplitude
- D. Depends on its source
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| 2 |
Cathode rays cast shadow when an opaque object is placed in their path. This behavior of cathode rays show that. |
- A. They move is straight line
- B. They are negatively charge
- C. They possess momentum
- D. They are energetic
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| 3 |
Quantum number values for 3p orbitals are. |
- A. n = 0, l = 3
- B. n = 3 , l = 1
- C. n = 2, l = 1
- D. n = 2 , l = 3
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| 4 |
In discharge tube, properties of X-rays depend upon the nature of. |
- A. Residual gas
- B. Cathode plate
- C. Anode plate
- D. All of these
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| 5 |
Transition from various energy levels to the lowest energy level gives. |
- A. Lyman series
- B. Balmer series
- C. Panchen sereis
- D. Pfund series
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| 6 |
Maximum number of electrons in f-subshell is. |
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| 7 |
Node is a surface on which probability of finding electron is |
- A. Zero
- B. More than 95%
- C. 50%
- D. Infinite
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| 8 |
If the electron in a hydrogen atom drops from n = 6 to n =4 level, the radiation emitted is in which series of lines in the spectrum of atomic hydrogen. |
- A. Lyman
- B. Balmer
- C. Paschen
- D. Brackett
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| 9 |
Hund's rule state that when electrons enter to the same sub levels they are. |
- A. Singly occupied with same spin
- B. Doubly occupy with same spin
- C. Singly occupied with different spin
- D. Doubly occupied with different spin
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| 10 |
The wave number of the light emitted by a certain source is 2 x 10<sup>6</sup>m<sup>-1</sup>The wave length of this light is. |
- A. 500 nm
- B. 500 m
- C. 200 nm
- D. 600 m
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