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

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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:

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