Chemistry - Salt Analysis Question with Solution | TestHub
ChemistrySalt AnalysisTEST OF CATIONS, Group 3, 4, 5, 6, 0Medium2 minQB
ChemistryMediummatching list
List - I (Consider given aq. metal salt, its treatment & observation) | List - II (Metal ion in aq. solution) |
|---|---|
(P) Metal salt yellow ppt. | (1) |
(Q) Metal salt violet purple solution (iii) | (2) |
(R) Metal salt Black ppt. | (3) |
Options:
Answer:
B
Solution:
P matches (2): Co²⁺ reacts with excess KNO₂ to form a yellow precipitate of potassium cobaltinitrite, K₃[Co(NO₂)₆].
Q matches (1): Mn²⁺ is oxidized by NaBiO₃ in an acidic medium (H₂SO₄) to form purple MnO₄⁻ ions.
R matches (3): Sn²⁺ in excess NaOH forms stannite ions, which reduce Bi³⁺ to metallic bismuth (Bi), producing a black precipitate.
Stream:JEESubject:ChemistryTopic:Salt AnalysisSubtopic:TEST OF CATIONS, Group 3, 4, 5, 6, 0
⏱ 2mℹ️ Source: QB
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