Chemistry - Salt Analysis Question with Solution | TestHub
List - I | List - II |
|---|---|
(P) | (1) Form ppt. with which dissolve on heating aq. suspension |
(Q) | (2) Form ppt. with which give another ppt. on heating aq. suspension |
(R) | (3) Produces gas with conc. having odour |
(S) | (4) Form ppt. with |
| (5) Anion decolorize solution |
Options:
Answer:
Solution:
(P) Cl⁻ → 1: Forms a white precipitate of PbCl₂ that dissolves upon heating the aqueous solution.
(Q) S₂O₃²⁻ → 2, 4, 5: Forms Ag₂S₂O₃ ppt which turns into black Ag₂S on heating, gives a precipitate with CuSO₄, and acts as a reducing agent to decolorize KMnO₄.
(R) SO₃²⁻ → 3, 5: Evolves pungent-smelling SO₂ gas with concentrated H₂SO₄ and decolorizes purple KMnO₄ solution.
(S) S²⁻ → 3, 4: Reacts with concentrated H₂SO₄ to release foul-smelling H₂S gas and forms a black precipitate of CuS with CuSO₄.
