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Question

Which of the following compounds can make hydrates?

A
MgCl2
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B
CaCl2
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C
NaCl
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D
KCl
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Solution

The correct options are
A MgCl2
B CaCl2
Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals. MgCl2 and
CaCl2 exist as MgCl2.6H2O and CaCl2.6H2O. NaCl and KCl do not form such hydrates.

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