Question

The reagent(s) with which the following reaction is accomplished is/are :

• A. $H_{3}P{O}_2$
• B. $C{H}_{3}C{H}_{2}OH$
• C. $H_{2}O$
• D. $H_{3}P{O}_3$

Answer 1

Answer: (A), (B)

$C{H}_{3}C{H}_{2}OH$

$H_{3}P{O}_2$ is the reagent that converts $N_2^{+}C{l}^{-}$ group into H. During this process $N_2$ and $HCl$ gas are released.

Diazonium salt with ethanol also replace $N_2$ by H atom.
Hence, (a) and (b) are correct.