Statement-1: Zinc ions are not precipitated by ammonia solution as zinc hydroxide, in the presence of ammonium chloride.
Statement-2: Presence. of ammonium chloride lowers the hydroxyl-ion concentration to such a value that the solubility product of $Zn (OH)_{2}$ is not attained.

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Statement-1 is True, Statement-2 is False.

Statement-1 is False, Statement-2 is True.

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

answer is A.

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Detailed Solution

In the presence of ammonium chloride, zinc ions are not precipitated as zinc hydroxide by ammonia solution. Because the presence of ammonium chloride reduces the hydroxyl-ion concentration to such a low level that the solubility product of zinc hydrooxide is not achieved.

So,statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.
Hence, option A is correct.

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