Question

In the reaction `A` is
.
A. `Cu_(2)Cl_(2)`s
B. `H_(3)PO_(2)` and `H_(2)O` .
C. `H^(+)//H_(2)O`
D. `hgSO_(4)//H_(2)SO_(4)` .

Answer 1

Correct Answer - B
Arenediazonium salts react with hypophosphorus acid `(H_(3)PO_(2))` to yield products in which diazonium salt has been replaced by `-H`
`ArN_(2)+Cl^(bar)+H_(3)PO_(2)+H_(2)OrarrArH+N_(2)+H_(3)PO_(3)+HCI`
During this process hypophosphorus acid is oxidized to phosphoric acid `(H_(3)PO_(3))` .