Question

Which reagent is appropriate to accomplish this conversion?

• A. $H_{3}P{O}_2/H_{2}O$
• B. $H_{3}P{O}_3/H_{2}O$
• C. $H_{3}P{O}_4/H_{2}O$
• D. All of the above

Answer 1

The correct option is A $H_{3}P{O}_2/H_{2}O$

We need to get rid of the $N_2^{+}C{l}^{-}$ part. So employ the de-diazotization reagent.
The answer is $H_{3}P{O}_2/H_{2}O$