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  4. A benzene derivative did not produce white precipitate with the ammonical silver nitrate solution but decolorized the cold dilute alkaline KMnO 4 solution. The compound is

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Q. A benzene derivative did not produce white precipitate with the ammonical silver nitrate solution but decolorized the cold dilute alkaline $KMnO _{4}$ solution. The compound is

TS EAMCET 2020

Solution:

$C _{8} H _{8}$ is
image
It is a derivative of benzene and decolorised the cold alkaline $KMnO _{4}$ solution.
The reaction occurs as follows:
$C _{8} H _{8}+2 KMnO _{4} \rightarrow KC _{8} H _{5} O _{2} +2 MnO _{2}+ KOH + H _{2} O$