A trisubstituted compound ' A ', C _ 10 H _ 12 O _ 2 gives neutral FeCl _ 3 test positive. Treatment of compound ' A ' with NaOH and CH _ 3 Br gives C _ 11 H _ 14 O _ 2 , with hydroiodic acid gives methyl iodide and

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The trisubstituted compound ' A ', C _ 10 H _ 12 O _ 2 gives neutral FeCl _ 3 test positive, means the compound is phenol. Phenol on treatment with NaOH and CH _ 3 Br gives C _ 10 H _ 11 O _ 2 CH _ 3 . The given compound is reacting with hot conc. NaOH gives a compound B , C _ 10 H _ 12 O _ 2 . The reaction is Cannizzaro's reaction. Hence, compound must be benzaldehyde derivative. Compound ' A ' also decolourises alkaline KMnO _ 4 , means compound contains an alkyl group attached to benzene ring. Hence, the structure of the compound can be written as follows, The reactions are shown below.

A trisubstituted compound ' A ', C _ 10 H _ 12 O _ 2 gives neutral...

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