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MHT CET202616 April 2026Evening ShiftChemistryCarboxylic Acid DerivativesActual

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

Options

  1. A- CHO
  2. B- C = O
  3. C- COCl
  4. D- COOH

Correct answer

D. - COOH

Step-by-step solution

Sodium bicarbonate ( NaHCO₃ ) is a weak base that reacts with compounds more acidic than carbonic acid ( H₂CO₃ ). Carboxylic acids ( - COOH ) react with sodium bicarbonate to produce sodium carboxylate, water, and carbon dioxide gas. The reaction is given by: R- COOH + NaHCO₃ R- COONa + H₂O + CO₂ The evolution of carbon dioxide ( CO₂ ) gas is observed as brisk effervescence. This test is the standard qualitative test used to detect the presence of the carboxylic acid functional group in an organic compound. Answer:

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