A) \[C{{O}_{2}}\]
B) \[N{{H}_{4}}OH\]
C) \[N{{H}_{4}}Cl\]
D) Liquid \[N{{H}_{3}}\]
Correct Answer: D
Solution :
\[N{{H}_{3}}\] is highly volatile compound. When vapourized, liquid ammonia causes intense cooling. Hence used as a coolant in ice factories and cold storages.
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