Phenol NaNO_2/H_2SO_4 B H_2O C NaOH D. Name of the above reaction is **[Guj CET 2005]**

JEE Main Chemistry question

Phenol . Name of the above reaction is **[Guj CET 2005]**

(A)Liebermann's reactionCorrect
(B)Phthalein fusion test
(C)Reimer-Tiemann reaction
(D)Schotten-Baumann reaction

Answer: (A)

Solution

Warming phenol with sodium nitrite and concentrated sulphuric acid, then diluting with water and finally adding excess NaOH, develops a characteristic blue colour via formation of the sodium salt of indophenol —

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Question ID VK-148519