A) slaked lime
B) calcium chloride
C) phosphorus pentoxide
D) quicklime
Correct Answer: D
Solution :
Quick lime,\[CaO\]is used to dry ammonia, as with other given dehydrating agents ammonia reacts. \[4N{{H}_{3}}+CaC{{l}_{2}}\xrightarrow{{}}CaC{{l}_{2}}\cdot 4N{{H}_{3}}\] \[4N{{H}_{3}}+2{{P}_{2}}{{O}_{5}}\xrightarrow{{}}4N{{H}_{4}}P{{O}_{3}}\] \[Ca{{(OH)}_{2}}\]is never used as dehydrating agent.
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