In the Liebermann's nitroso reaction,the sequ | vedclass

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(A) The Liebermann's nitroso reaction is a test for phenols. When phenol is treated with $NaNO_2$ and concentrated $H_2SO_4$,it forms a $p$-nitrosophe

Vedclass · Accepted Answer

Brown or red $	o$ green $	o$ deep blue

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(A) The Liebermann's nitroso reaction is a test for phenols. When phenol is treated with $NaNO_2$ and concentrated $H_2SO_4$,it forms a $p$-nitrosophenol. This $p$-nitrosophenol reacts with excess phenol to form an indophenol dye. The colour changes observed during the reaction are: $1$. Initially,the solution turns red or brown. $2$. On heating or dilution,it turns green. $3$. Upon adding water or alkali,it turns deep blue. Therefore,the sequence is $Red/Brown 	o Green 	o Deep \ Blue$.

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

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