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pH the Power of H

White sodium ...

Question

White sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. $H N O_{3}$ . The anion could be

A

C O_{3}^{2 -}

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B

C l^{-}

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C

S O_{4}^{2 -}

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D

S^{2 -}

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Solution

The correct option is C $C l^{-}$
Since reaction of ${A g N O}_{3}$ with sodium from white precipitate, Hence only $A g C l$ give white precipitate. Hence salt must be sodium chloride.
$N a C l + A g {N O}_{3} \to A g C l ↓ + N a {N O}_{3}$
white ppt.
$(s o l u b l e i n {N H}_{4} O H B u t n o t i n {H N O}_{3})$

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