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Q. Phenol gives characteristic colouration with

NTA AbhyasNTA Abhyas 2020

Solution:

Phenols give blue or violet colouration with $\text{F}\text{e}\text{C}\text{l}_{3}$ solution.

$\text{F}\text{e}\text{C}\left(\text{l}\right)_{3}+6\left(\text{C}\right)_{6}\left(\text{H}\right)_{5} \, \text{O}\text{H} \, \rightarrow \left(\text{H}\right)_{3}\left[\text{F} \text{e} \, \left(\left(\text{C}\right)_{6} \left(\text{H}\right)_{5} \text{O}\right)_{6}\right]+3\text{H}\text{C}\text{l}$