Question

Which of the following is used as a moderator in a nuclear reactor

• A. $D_{2}O$
• B. $N_{2}O$
• C. $H_{2}O$
• D. $NaOH$

Answer 1

Answer: (A)

$D_{2}O$

Answer 2

Heavy water $(D_{2}O)$ is used as a moderator in a nuclear reactor. It slows down the speed of neutrons. It also acts as a coolant.