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In the reaction A is ....

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)` .

Text Solution

Verified by Experts

The correct Answer is:
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Arenediazonium salts react with hypophosphorus acid `(H_(3)PO_(2))` to yield products in which diazonium salt has been replaced by `-H`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))` .
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