Question

A reagent that can be used to reduce benzene diazonium chloride to benzene is:

• A. ethanol
• B. methanol
• C. methanoic acid
• D. acetone
• E. phosphorous acid

Hint:

Benzene diazonium salts are often reduced to benzene by various reducing agents, including alcohols like ethanol and phosphorous acid. This reaction is commonly used in the preparation of substituted benzenes.

Answer 1

The Correct Option is A

The reduction of benzene diazonium chloride to benzene is a well-known reaction in organic chemistry. One of the reagents that can reduce benzene diazonium chloride (\(C_6H_5N_2Cl\)) to benzene is ethanol (\(C_2H_5OH\)).
The reaction proceeds as follows:
\[ C_6H_5N_2Cl + C_2H_5OH \rightarrow C_6H_6 + C_2H_5OH_2^+ \] Ethanol acts as a reducing agent, providing the necessary hydrogen to reduce the diazonium group and yielding benzene.