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Q.

${NH}_{3}$ gas can be dried by passing it over :

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a

CaO

b

Concentrated $H_{2} {SO}_{4}$

c

$P_{2} O_{5}$

d

Anhydrous ${CaCl}_{2}$

answer is D.

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Detailed Solution

CaO being basic, does not react with ${NH}_{3}$ . The other compounds react with ${NH}_{3}$ . So it is used as drying agent.

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