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Q.
Benzene diazonium chloride when reacts with hypophosphorus acid produces
Amines
Solution:
If a diazonium salt is reacted with hypophosphorous acid $H _{3} PO 2$ which is a reducing agent the salt is reduced to $H$. Benzene diazonium chloride when reacts with hypophosphorus acid produces benzene.
$C _{6} H _{5}- N _{2}^{+} Cl ^{-}+ H _{3} PO _{2}+ H _{2} O \rightarrow C _{6} H _{6}+ N _{2} \uparrow+ H _{3} PO _{3}+ HX$