An aqueous solution of a substance gives a white precipitate on treatment with dil. HCl which dissolves on heating, When H2S is passed through the hot acidic solution, black precipitate is obtained. T

Question

An aqueous solution of a substance gives a white precipitate on treatment with dil. HCl which dissolves on heating, When H2S is passed through the hot acidic solution, black precipitate is obtained. The substance is:

Prashant Kotian · Accepted Answer

Correct answer: D. Pb2+(aq) + 2HCl (dil.) -> PbCl2 (white ppt.). White ppt. of PbCl2 is soluble in hot water. Pb2+ ions give black ppt. of PbS with H2S.

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