Question

The velocity of neutrons in a nuclear reactor is slowed down by using:

• A. heavy water $D_{2}O$
• B. ordinary water $H_{2}O$
• C. Zinc rod
• D. fused caustic soda

Answer 1

The correct option is A

heavy water $D_{2}O$

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