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 exchange reaction to study reaction mechanism 3. Viscosity of heavy water is relatively smaller than that or ordinary water The dielectric constant of heavy water is smaller than that of ordinary water Select the correct answer using the code given below :

Which of the following statements regarding heavy water are correct ?

1.	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 exchange reaction to study reaction mechanism 3. Viscosity of heavy water is relatively smaller than that or ordinary water The dielectric constant of heavy water is smaller than that of ordinary water Select the correct answer using the code given below :
Answer» 1 and 2 2 and 3 3 and 4 1 and 4 Solution :Mostcommercialnuclear reactors usenormal water(alsocalledlightwater)as aneutronmoderator. DIELECTRIC constant of heavywateris smaller than thatof ordinarywater .