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Q.

An aqueous solution containing a cation, gives a white precipitate with dilute ‘HCl’ and the precipitate is soluble in hot water.  H2S gas passed through hot acidic solution gives black precipitate. Then the cation is

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a

Pb2+

b

Ag+

c

Hg22+

d

Cu2+

answer is A.

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An aqueous solution containing a cation, gives a white precipitate with dilute ‘HCl’ and the precipitate is soluble in hot water.  H2S gas passed through hot acidic solution gives black precipitate. Then the cation is