JEE Main 2024 Chemistry question
In chromyl chloride test for confirmation of Cl⁻ ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and 10% H₂O₂ turns organic layer blue indicating formation of chromium pentoxide. The oxidation state of chromium in that is
Answer: (A)
Solution
Cr₂O₇²⁻ + 4Cl⁻ + 6H⁺ → 2CrO₂Cl₂ (red); CrO₂Cl₂ + 4NaOH → Na₂CrO₄ (yellow) + 2NaCl + 2H₂O; Na₂CrO₄ is acidified and treated with H₂O₂ in
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