A mixture of two aromatic compounds (A) and (B) separated by dissolving it in chloroform followed by extraction with aqwueous ` KOH` solution. The organic layer containing compound (A) when heate with alcoholic solution of ` KOH` produced a compound (C ) `( C_7 H_5 N)` associated with an unpleasnt odour . The alkaline aqueous layer on the other hand , when heated with chloroform and then acidified gave a mixture of two isometic compounds (D) and (E ) of molecular formula ` C_7 H_6O_2`. Identity the compounds (A), (B ) . (C ) (D), and (E ) and write their structures .

Explanation

To solve the problem step-by-step, we will identify the compounds A, B, C, D, and E based on the given information.

### Step 1: Identify Compound A
- The problem states that compound A is separated into the organic layer when a mixture of two aromatic compounds is dissolved in chloroform and then extracted with aqueous KOH.
- Since A is in the organic layer, it is likely to be an aromatic amine due to the subsequent reaction with alcoholic KOH producing an unpleasant odor.
- Given the unpleasant odor, we can deduce that compound C is likely an isocyanide, which is known for its foul smell.
- Therefore, compound A is **aniline (C6H5NH2)**.

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