In the Liebermann’s nitroso reaction, sequential changes in the colour of phenol occurs as

Question

In the Liebermann’s nitroso reaction, sequential changes in the colour of phenol occurs as (A) Brown or red → green → red → deep blue (B) Red → deep blue → green (C) Red → green → white (D) White → red → green

Tardigrade Admin · Accepted Answer

In Liebermanns nitroso reaction, phenol is treated with sodium nitrite in presence of concentrated sulphuric acid and heated gently to obtain a blue colour. It is then diluted with water to obtain red solution. On basification, with dil. NaOH solution, it turns blue.

Q. In the Liebermann’s nitroso reaction, sequential changes in the colour of phenol occurs as

Brown or red $\to$ green $\to$ red $\to$ deep blue

Red $\to$ deep blue $\to$ green

Red $\to$ green $\to$ white

White $\to$ red $\to$ green

In Liebermanns nitroso reaction, phenol is treated with sodium nitrite in presence of concentrated sulphuric acid and heated gently to obtain a blue colour. It is then diluted with water to obtain red solution. On basification, with dil. $N a O H$ solution, it turns blue.