In the Liebermann’s nitroso reaction,the chan | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In Liebermann's nitroso reaction,phenol is treated with sodium nitrite in the presence of concentrated sulphuric acid $(H_2SO_4)$ and heated gentl

Vedclass · Accepted Answer

Brown or red-greenish red-deep blue

Vedclass · Answer

(A) In Liebermann's nitroso reaction,phenol is treated with sodium nitrite in the presence of concentrated sulphuric acid $(H_2SO_4)$ and heated gently to obtain a deep blue or green colour.When this mixture is diluted with water,it turns red.Upon adding an alkali like $NaOH$ solution,the solution turns deep blue.Thus,the characteristic colour sequence observed is brown or red $\rightarrow$ greenish red $\rightarrow$ deep blue.

In the Liebermann’s nitroso reaction,the changes in the colour of phenol occur as:

Similar Questions

Which of the following compounds decolourises $Br_2 / H_2O$ and also gives a positive test with neutral $FeCl_3$?

Phenol on distillation with zinc dust gives

Phenol $\xrightarrow[{{H^ + }}]{{CHCl_3/NaOH}}$ Salicylaldehyde. The above reaction is known as:

Which of the following reactions is used to obtain salicylic acid from phenol?

With excess bromine,phenol reacts to form:

Vedclass Test Series

Exam Paper Generator

Online Exam Module