11. Nuclear fission experiments show that the neutrons split the uranium nucleus into two fragments of about the same size. The process is accompanied by the emission of several

1. 1. Protons and positrons

   
   
   

   2. α - particles

   
   
   

   3. Neutrons

   
   
   

   4. Protons and α-particles

   
   
   

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   NA

   Correct Option: C

   NA

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12. The fourth state of matter is known as

1. 1. Gas

   
   
   

   2. vapour

   
   
   

   3. Plasma

   
   
   

   4. Electrons

   
   
   

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   NA

   Correct Option: C

   NA

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13. The mass energy relation is the out come of

1. 1. Quantum theory

   
   
   

   2. General theory of relativity

   
   
   

   3. Field theory of relativity

   
   
   

   4. Special theory of relativity

   
   
   

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   NA

   Correct Option: D

   NA

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14. Hydrogen bomb is based upon the principle of

1. 1. Nuclear fission

   
   
   

   2. Nuclear fusion

   
   
   

   3. Controlled nuclear fission

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: B

   NA

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15. Alpha rays emitted from a radioactive substance are

1. 1. Negatively charged particles

   
   
   

   2. Hydrogen nuclear

   
   
   

   3. Helium nuclear

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: C

   NA

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