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  1. In nuclear reactor, heavy water is used as

  2. A.

     Coolant

    B.

     Fuel

    C.

     Moderator

    D.

     Atomic smasher

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    Answer : Option C

    Explanation :

    Moderator is required in a Nuclear reactor to slow down the neutrons produced during the fission reaction so that the chain reaction can be sustained. Heavy Water is an excellent moderator due to its high moderating ratio and low absorption cross section for neutrons.


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