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An aqueous solution of a mixture of two ...

An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCI, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolved in hot water. The filtrate (Q) remained unchanged, when treated with `H_(2)S` in a dilute mineral acid medium. However, it gave a precipitatew (R) with `H_(2)S` in an ammoniacal medium. The precipitate (R) gave a coloured solution (S), when treated with `H_(2)O_(2)` in an aqueous NaOH medium. The precipitate (P) contains ------ while the colored solution (S) contains

A

`Pb^(2+)`

B

`Hg_(2)^(2+)`

C

`Ag^(+)`

D

`Hg^(2+)`

Text Solution

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The correct Answer is:
A
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An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl , gave a precipiate (P) and filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H_(2)S in a dilute mineral acid medium. However, it gave a precipitate (R) With H_(2)S in an ammoniacal medium. The precipitate R gave a coloured solution (S), when treated with H_(2)O_(2) in an aqueous NaOH medium. The coloured solution S contains