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Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl₂.6H₂O, BaCl₂. 2H₂O, SrCl₂.6H₂O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides?

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Act as dehydrating agent

Can absorb moisture from air

Tendency to form hydrate decreases from calcium to barium

All of the above

answer is D.

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Detailed Solution

Due to their hygroscopic nature, they can be used as a dehydrating agent to absorb moisture from air, Extent of hydration decreases from Mg to Ba, i.e., MgCl₂. 6H₂O,CaCl₂. 6H₂O,BaCl₂. 2H₂O,SrCl₂.

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