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  4. Two aromatic compounds having formula C7H8O which are easily identifiable by FeCl3 solution test (violet colouration) are

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Q. Two aromatic compounds having formula $C_7H_8O$ which are easily identifiable by $FeCl_3$ solution test (violet colouration) are

WBJEEWBJEE 2011Alcohols Phenols and Ethers

Solution:

$o-, m$ - and $p$ - cresol all contain phenolic group, thus they give violet colouration with $FeCl _{3}$ whereas benzylalcohol and methyl phenyl ether donot contain phenolic group, hence give no colouration with $FeCl _{3}$. Hence the pair of compounds which are identifiable by $FeCl _{3}$ is o-cresol and benzyl alcohol.
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