Identify the nonbenzenoid aromatic compound from the following.

The rate-determining step for the preparation of nitrobenzene from benzene is:

Total number of aromatic compounds from the following is:

What is the molecular formula of the product formed when benzene is reacted with ethyl chloride in the presence of anhydrous aluminium chloride?

The major product $X$ is:

Explain the bromination of benzene with its mechanism.