On heating a mixture of sodium benzoate and sodalime,the following is obtained:

For the given reaction:
$CH_{3}-CH=CHBr \xrightarrow[2. \text{Red hot iron tube}, 873 \text{ K}]{1. \text{NaNH}_{2}} A$ (major product)
Identify the major product $A$.

Which of the following is formed as a result of biological oxidation of benzene in the body of the dog?

Product $(B)$ in this reaction is

Which one of the following functional groups is not meta directing?

The product obtained by the reaction of benzene with concentrated $HNO_3$ and concentrated $H_2SO_4$ at $353$ to $363 \, K$ is....