Question

The velocity of neutrons in nuclear reactor is slowed down by.

• A. Heavy water $(D_{2}O)$
• B. Ordinary water $(H_{2}O)$
• C. Zinc rod
• D. Fused caustic soda

Answer 1

Answer: (A)

Heavy water $(D_{2}O)$

Answer 2

Heavy water i.e., $D_{2}O$ slows down the speed of neutrons in nuclear reactors.