Multiple choice

What kind of water is used in a nuclear reactor?

  1. Hard water

  2. Soft water

  3. Heavy water

  4. Light water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy water (D2O - deuterium oxide) is used as a moderator in nuclear reactors. It slows down neutrons effectively to sustain the nuclear chain reaction while absorbing fewer neutrons than light water. Heavy water's neutron moderation properties make it essential for certain types of nuclear reactors, particularly those using natural uranium.

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