MCQ
Benzylamine & aniline can be distinguished by
- AIsocynide test
- BMusturd oil test
- ✓Dye-azo test
- DHinsberg test
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If $(n=4)$ then di-carboxylic acid. would be known as

Reason : Oxidation state of $Cl$ in $HClO_4$ is $+7$ and in $HClO_3$, it is $+ 5$.