Question

In which of the following, reagent and product are correctly matched with respect to benzene diazonium chloride as reactant?

• A. Cu2O ; C6H5Br
• B. HI ; C6H5
• C. NaNO2 ; C6H5NO
• D. CH3CH2OH ; C6H6

Hint:

To reduce benzene diazonium chloride to benzene, use ethanol or hypophosphorous acid.

Answer 1

The Correct Option is D

Benzene diazonium chloride can be reduced to benzene using ethanol (CH\textsubscript{3}CH\textsubscript{2}OH) as a reducing agent.
Other matches are incorrect:
- Cu\textsubscript{2}O is not used for bromination; CuBr is.
- HI does not convert diazonium salts to aryl iodides (KI is used).
- NaNO\textsubscript{2} is used to prepare diazonium salts, not convert them to nitroso compounds.