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CBSE Class 12 · 2003 · All India Compartment · Alcohols Phenols and EthersVery Short Answer

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Give a chemical test to distinguish between phenol and benzoic acid.

Solution

With aqueous NaHCO: benzoic acid, the stronger acid, liberates CO with brisk effervescence; phenol (weaker than carbonic acid) gives none.
Confirm with neutral FeCl: phenol gives a \textbf{violet} colouration, benzoic acid does not.

CBSE Class 12 Board · 2003 · All India Compartment · Subjective

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