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An aqueous solution of a substance gives...

An aqueous solution of a substance gives a white percipitate on treatment with dil `HCl`, which dissole on heating. On passing `H_(2)S` in hot acidic solution a black percipitate is formed. The substance is:

A

`Hg_(2)^(2+)` salt

B

`Hg^(2+)` salt

C

`Ag^(+)` salt

D

`Pb^(2+)` salt

Text Solution

Verified by Experts

The correct Answer is:
D
`Pb^(3+)(aq)+2HCl(dil.)toPbCl_(2)`(white ppt.)
White ppt. of `PbCl_(2)` is soluble in hot water. `Pb^(3+)` ions give black ppt. of PbS with `H_(2)S`.
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