Question

Which of the following is not the method of preparation of phenol?

• A. Chlorobenzene
• B. Benzene
• C. Aniline
• D. Cumene

Answer 1

The Correct Option is B

Benzene itself is not a method of preparing phenol. Phenol is typically produced from benzene through various chemical processes such as the cumene process or the Raschig process, but benzene alone is not a method for directly preparing phenol. 
To summarize: 
(A) Chlorobenzene: While not a direct method, chlorobenzene can be used as a starting material for the synthesis of phenol. 
(B) Benzene: Benzene is not a method of preparation for phenol. 
(C) Aniline: Aniline can undergo certain chemical reactions to produce phenol, such as in the Raschig process. 
(D) Cumene: The cumene process is a well-known method for the industrial production of phenol. 
Therefore, the correct answer is (B) Benzene, as it is not a method of preparation for phenol.