Home Chemistry Haloalkanes and Haloarenes Preparation of Haloarenes Which of the following statement is incorrec…
Chemistry Haloalkanes and Haloarenes Preparation of Haloarenes Single Correct MCQ
Published on: August 13, 2026

Which of the following statement is incorrect regarding Sandmeyer's reaction?

A
It involves preparation of haloarenes from benzene diazonium halide.
B
Replacement of the diazonium group by iodine requires the presence of cuprous iodide.
C
Reaction of benzene diazonium chloride with cuprous bromide gives bromobenzene.
D
The reaction takes place very easily because of very high leaving tendency of nitrogen.

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The correct answer is:
B

In Sandmeyer reaction, is required to reduce the diazonium into nitrogen and forming a

radical. But in case of iodine, it itself is oxidized by diazonium and therefore does not require copper.

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