Name an alkylbenzene widely used as a chemical intermediate in the production of phenol.

Cumene

The correct answer is Option (1) - Cumene

• One alkylbenzene widely used as a chemical intermediate in the production of phenol is cumene (isopropylbenzene).
• Cumene is oxidized to cumene hydroperoxide, which is then cleaved to phenol and acetone.
• This process is known as the cumene process and is one of the most important methods for the commercial production of phenol.