Calcium chloride is used as a dehydration agent because:

it has a strong affinity for water

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it has water of crystalline attached to it

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it loses water when exposed to air

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it has a high melting point.

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Solution

The correct option is A it has a strong affinity for water
The halides of alkaline earth metals are hygroscopic in nature. ${C a C l}_{2}$ has a great affinity towards water.

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