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  4. Phenol, in Liebermann's nitroso test, give the colour:

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Q. Phenol, in Liebermann's nitroso test, give the colour:

MGIMS WardhaMGIMS Wardha 2003

Solution:

Phenol gives Liebermann's nitroso test to give deep blue colour due to the formation of sodium salt of indophenol. $ Phenol\xrightarrow[conc.{{H}_{2}}S{{O}_{4}}]{NaN{{O}_{2}}}Blue\xrightarrow{HOH}\operatorname{Re}d $

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