MHT CET 2026 Chemistry question

When sodium bicarbonate is added to an organic compound, brisk effervescences is evolved. This indicate the presence of which functional group.

(A)-CHO
(B)-C = 0
(C)-COCl
(D)-COOHCorrect

Answer: (D)

Solution

Carboxylic acids are strong enough acids (pKa about 4-5) to decompose sodium bicarbonate, releasing carbon dioxide with brisk effervescence: RCOOH + NaHCO_3 \to RCOONa + H_2O + CO_2\uparrow. Hence the group is , option (D). Phenols and alcohols

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Question ID VK-099095