In the above reaction, the reagent " A " is :

In the above reaction, the reagent "A" is :

  1. NaBH4,H3O+
  2. LiAlH4
  3. Alkaline KMnO4,H+
  4. HCl,Zn-Hg

Solution

KMnO4 in presence of acidic medium shows oxidation reaction. 

It converts carbon into acid if carbon is connected to benzene group directly and having at least one hydrogen with it then it can be converted into acid otherwise not. As shown below:

Asked in: JEE Main 2021 (16 Mar Shift 2)

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