Which is least soluble in water?

A g C l

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A g F

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A g I

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A g B r

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Solution

The correct option is C $A g I$
$As the size of anion increases, the tendency to polarise cation increases and therefore, the covalent character$ $increases. Covalent compounds are insoluble in water. Therefore, AgF will be the most ionic compound and so it$ $will be most soluble in water while AgI will be the least soluble.$

$Solubility order: AgF>AgCl>AgBr>AgI.$

Hence, option (C) is correct.

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