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Identify the correct’ formula of halides of alkaline earth metals from the following.
(a) BaCl2.2H20
(b) BaCl2 .4H20
(c) CaCl2 . 6H20
(d) SrCl2.4H20

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C is the correct option. Except BeCL2 ,all alkaline earth meatl halides form hydrates and their tendency for hydration decrease down the group Halides of Sr,Ba dehydrate easily upon heating
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