JEE Main Chemistry question

Oxalic acid, malonic acid and succinic acid can be distinguished by:

(A)HeatCorrect
(B)Acidified KMnO₄
(C)Br₂ water
(D)NH₃

Answer: (A)

Solution

These diacids show characteristically different thermal behaviour: oxalic acid decomposes readily at relatively low temperature (to CO₂/CO/H₂O or HCOOH), malonic acid decarboxylates near 150 °C

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Question ID VK-150090