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(b) (i) How is Aniline converted into Phenol? (ii) What is the action of HCN on (1) propanone (2) 2,4-dichlorobenzaldehyde. |
Answer» Solution :(b) (i) Aniline is diazotized with NITROUS acid (NANO2 + HCl) at 273-278K to GIVE benzene diazonium chloride which on further treatment with hot water in the presence of mineral acid gives phenol.  (ii) 1. Propanone reacts with HCN: `underset(underset(("Acetone"))(("Propanone")))(CH_(3) - underset(underset(O)(||))(C) - CH_(3) + HCN) rarr underset(underset(("Cyanohydrin"))(("Acetone")))(CH_(3) - underset(underset(OH)(|))overset(overset(CN)(|))(C) - CH_(3))` 2. 2,4-dichlorobenzaldehyde reacts with HCN: 
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