Calcium Oxide can be used for drying of:

C l_{2}

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H_{2}

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N H_{3}

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C O_{2}

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Solution

The correct options are
A $H_{2}$
C $N H_{3}$
Calcium oxide reacts with chlorine and carbon dioxide. Hence, it cannot be used for drying chlorine and carbon dioxide.

On the other hand, calcium oxide does not react with hydrogen and ammonia gases.

Hence, calcium oxide can be used for drying hydrogen and ammonia gases.

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H_{2} S O_{4}

H_{2} S

N H_{3}

a

{N H}_{3} = 4.17, {C O}_{2} = 3.59, {S O}_{2} = 6.71, {C l}_{2} = 6.49

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