JEE Advanced Chemistry question

Chemistry Redox Reactions JEE Advanced

Match the species in Column I (that can react — oxidize, reduce, or give a precipitate) with the species in Column II, and select the correct code.

Column I: A. B. C. D. E. Column II: 1. 2. 3. 4. 5.

Codes (A B C D E):

(A)1,3,4 | 1,4 | 2 | 2,5 | 1,4Correct
(B)1,4 | 2 | 2,5 | 1,3,4 | 2,4
(C)2 | 2,5 | 1,3,5 | 1,4 | 1
(D)2,5 | 1,3,4 | 2,4 | 1,4 | 2

Answer: (A)

Solution

is oxidized by both dichromate and permanganate, and also gives a precipitation/redox reaction with ferricyanide (Turnbull's blue), so A → 1, 3, 4. Oxalate is oxidized by both dichromate and permanganate (classic redox titrations), so B → 1, 4. gives the classic yellow

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Question ID VK-159931