pBlock ElementsII - Result Question 41
####41. Ammonia gas can be dried by
(a) conc $H _2 SO _4$
(c) $CaCl _2$
(b) $P _2 O _5$
(d) quicklime
$(1978,1 M)$
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Solution:
- Quicklime $(CaO)$ is used for drying $NH _3$ gas because both are basic, do not react. On the other hand, $H _2 SO _4$ and $P _2 O _5$ are acidic, reacts with ammonia forming salts. $CaCl _2$ forms complex with ammonia.
