question_answer

Nitroso amine \[+\] phenol \[\xrightarrow{conc.\,{{H}_{2}}S{{O}_{4}}}\]red or brown colour \[\xrightarrow{base}\] blue or violet. The name of this reaction is:

A)  Lucas test

B)                         Coupling reaction

C)                         Ledrer- Mannase reaction

D)                         Libermann nitroso reaction

Correct Answer: D

Solution :

Libermann nitroso reaction, \[Red\,colour\text{ }\xrightarrow{blue}Blue\text{ }colour\]