An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulphide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

Question

An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulphide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a (A) Hg22+ salt (B) Cr2+ salt (C) Ag+ salt (D) Pb2+ salt

Tardigrade Admin · Accepted Answer

PbCl2 is soluble in hot water and PbS (black) is formed on passing H2 S(g) through acidic solution.

Q. An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulphide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

$H g_{2}^{2 +}$ salt

$C r^{2 +}$ salt

$A g^{+}$ salt

$P b^{2 +}$ salt

$P b C l_{2}$ is soluble in hot water and $P b S$ (black) is formed on passing $H_{2} S (g)$ through acidic solution.

Q. An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulphide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

Hg22+​ salt

Cr2+ salt

Ag+ salt

Pb2+ salt

PbCl2​ is soluble in hot water and PbS (black) is formed on passing H2​S(g) through acidic solution.

$H g_{2}^{2 +}$ salt

$C r^{2 +}$ salt

$A g^{+}$ salt

$P b^{2 +}$ salt

$P b C l_{2}$ is soluble in hot water and $P b S$ (black) is formed on passing $H_{2} S (g)$ through acidic solution.