Which of the following reagents can be used to convert benzenediazonium chloride into benzene ?

Options

A. `CH_(3)OH`
B. `H_(3)PO_(2)`
C. `Br_(2)//H(2)O`
D. `LiAiH_(4)`

Answer

B

Explanation

Hypophophorus acid (phosphinic acid) `H_(3)PO_(2)` reduces diazonium salts to arenes and gets oxidized to phosphoric acid
`ArN_(2)^(+)Cl^(bar)+H_(3)Po_(2)+H_(2)Orarr ArH + N_(2)+H_(3)PO_(3)+HCI`
Since benzenediazonium salts are synthesized in aqueous solution `LiAIH_(4)` can t be used for reduction as t reacts vigorously with water .