Which has least molar solubility in $H_{2} O$ ?

L i C l

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N a C l

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K C l

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C s C l

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Solution

The correct option is A $L i C l$
As we move down the group the solubility of chlorides of alkali metals increases as the ionic nature of the compound increases. So, $L i C l$ has the least molar solubility as it is a weak ionic compound.

Hence option A is correct.

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