A salt which gives CO_2 with hot H_2SO_4 and also decolourises acidified KMnO_4 on warming is:

JEE Main Chemistry question

A salt which gives with hot and also decolourises acidified on warming is:

(A)
(B)
(C)OxalateCorrect
(D)Acetate

Answer: (C)

Solution

The oxalate ion liberates when treated with hot dilute sulphuric acid and, being a good reducing agent, also decolourises acidified potassium permanganate on warming ($ + + → +

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Question ID VK-138776