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Question

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aforementioned solution, a white precipitate is obtained which does not dissolve in dil. nitric acid. The anion is:

A
CO23
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B
S2
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C
SO24
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D
Cl
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Solution

The correct option is D Cl
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aforementioned solution, a white precipitate is obtained which does not dissolve in dil. nitric acid. The anion is Cl.
Cl ions react with AgNO3 to form a white curdy ppt of AgCl, which is water insoluble and also insoluble in dil HNO3 but soluble in dilute ammonia due to formation of soluble complex.
Cl+Ag+AgCl
AgCl+2NH3[Ag(NH3)2]Cl

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