JEE Main Chemistry question

Which of the following reagents may be used to distinguish between phenol and benzoic acid? **[AIEEE 2011]**

(A)Aqueous NaOH
(B)Tollen's reagent
(C)Molisch reagent
(D)Neutral Correct

Answer: (D)

Solution

Neutral ferric chloride gives a characteristic violet colour with phenol (a true phenolic ) but gives no such colour with benzoic acid (a carboxylic acid, no phenolic OH). Aqueous NaOH

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Question ID VK-148529