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In a nuclear power reactor, which material is commonly used as a moderator to slow down fast neutrons?

ALiquid Lead
BUranium Hexafluoride
CHeavy Water (D2O) or Graphite
DSodium Chloride

Explanation

Heavy water (D2O) and graphite act as moderators to slow down fission neutrons in nuclear reactors.

Exam Relevance
  • Topic: Physical Sciences, Chemistry & Technology
  • Subtopic: SI Units, Instruments, Chemical Compounds & Optics
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