Hydrolysis of phenyl isocyanide forms

Step-by-step solution

Note: Isocyanides are hydrolyzed only by acids, but not by alkalies. It is because negative charge present on the carbon atom in isocyanides initially attracts electrophile (i.e., H + ). R - N + ≡ C - : + H + → R - N + ≡ C H → H 2 O R - N = C | H - O H → T a u t o m e r i s m R - N H - C | | O - H → H + / H 2 O R - N H 2 + H C O O H