UPSC CAPF Assistant Commandant Model Paper 5

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Question : 43 of 125
 
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Which of the following statements regarding heavy water are correct?
1. It is extensively used as a moderator in nuclear reactors
2. It cannot be used in an exchange reaction to study the reaction mechanism
3. The viscosity of heavy water is relatively smaller than of ordinary water
4. The dielectric constant of heavy water is smaller than that of ordinary water
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