Question no 2732 SSC CGL Tier 1 Genral Awareness Questions and Answers Online Test 60

SSC CGL Tier 1 :: GA Test 60

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1 .

Which one of the following is heavy water used in nuclear reactor?

[ A ] Water having molecular weight 18 u
[ B ] Water having molecular weight 20 u
[ C ] Water at 4�C but having molecular weight 19 u
[ D ] Water below the ice in a frozen sea

Answer : Option B

Explanation :

Heavy water ($D_ 2$ O) is used in nuclear reactor as a moderator. The deuterium is an isotope of hydrogen. Its atomic mass is 2. Hence its molecular weight is 20u (2 + 18).

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