121. Nuclear forces are mediated by

1. 1. Proton

   
   
   

   2. Neutron

   
   
   

   3. Meson

   
   
   

   4. Electron

   
   
   

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   NA

   Correct Option: C

   NA

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122. Nuclear forces are

1. 1. Spin dependent

   
   
   

   2. Charge dependent

   
   
   

   3. Long range

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: A

   NA

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123. The electron emitted in beta radiation originates from

1. 1. Inner orbit of atoms

   
   
   

   2. Free electrons existing in nucleus

   
   
   

   3. Decay of a neutron in a nucleus

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: C

   NA

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124. In which of the following decays, the atomic number decreases ?

1. 1. β^- - decay

   
   
   

   2. β⁺ - decay

   
   
   

   3. α - decay

   
   
   

   4. b and c both

   
   
   

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   NA

   Correct Option: D

   NA

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125. The first explosion of an atomic device in India was carried out in the state of

1. 1. Jammu and Kashmir

   
   
   

   2. Nagaland

   
   
   

   3. Manipur

   
   
   

   4. Rajasthan

   
   
   

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   NA

   Correct Option: D

   NA

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