Q100 / 180 · AIIMS 2019 (25 May) · Physics

Assertion : Heavy water is a better moderator than normal water. Reason : Heavy water absorbs neutrons more efficiently than normal water.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true but reason is not the correct explanation of assertion.
Correct answer
C
If assertion is true but reason is false.
D
If both assertion and reason are false.

Solution

The assertion is true because heavy water is a better moderator than ordinary water. This is because heavy water absorbs fewer neutrons than normal water. The reason is false.

Hence, the correct answer is option: 'C'.

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