A) compound of deuterium and oxygen
B) water at \[4{}^\circ C\]
C) water, in which soap does not lather
D) compound of heavy oxygen and heavy hydrogen
Correct Answer: A
Solution :
The chemical formula of heavy water is \[{{D}_{2}}O.\]Here D is the heavy isotope of hydrogen (H) with mass number 2 i.e. deuterium \[_{1}{{D}^{2}}\] and O stands for oxygen. Hence, heavy water is a compound of deuterium and oxygen.
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