Q.

Reagent 'X' dissolves AgCl precipitate to form a soluble complex 'Y'. On passing H2S gas through Y, a black precipitate is obtained.

Find the number of possibilities of 'X' from the following reagents.

KCN; conc. HCl; Na2S2O3; NH3;  dil. HNO3

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answer is 4.

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Detailed Solution

The number of possibilities of 'X' from the following reagents are,

KCN;  conc. HCl; Na2S2O3; NH3

These are total 4 in numbers, Thus, the correct answer is 4.

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