66. Discovery of the nucleus of an atom was due to the experiment carried out by

1. 1. Bohr

   
   
   

   2. Rutherford

   
   
   

   3. Moseley

   
   
   

   4. Thomson

   
   
   

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   NA

   Correct Option: B

   NA

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67. The charge on position is equal to the charge on

1. 1. proton

   
   
   

   2. electron

   
   
   

   3. α - particle

   
   
   

   4. neutron

   
   
   

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   NA

   Correct Option: A

   NA

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68. Propagation of light quanta may be described by

1. 1. photons

   
   
   

   2. protons

   
   
   

   3. neutrons

   
   
   

   4. electrons

   
   
   

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   NA

   Correct Option: A

   NA

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69. Consider the following part of spectra
    1. visible
    2. infrared
    3. ultraviolet
    4. microwave
    Which of the following is the correct sequance in which the wavelengths in crease ?

1. 1. 4 - 3 - 1 - 2

   
   
   

   2. 4 - 1 - 2 - 3

   
   
   

   3. 3 - 2 - 1 - 4

   
   
   

   4. 3 - 1 - 2 - 4

   
   
   

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   NA

   Correct Option: D

   NA

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70. Which of the properties of the elements is a whole number ?

1. 1. Atomic mass

   
   
   

   2. Atomic number

   
   
   

   3. Atomic radius

   
   
   

   4. Atomic volume

   
   
   

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   NA

   Correct Option: B

   NA

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