Question

The correct statement(s) related to oxoacids of phosphorous is(are)

• A. Upon heating, $H_{3}P{O}_3$ undergoes disproportionation reaction to produce $H_{3}P{O}_4$ and $P{H}_3$.
• B. While $H_{3}P{O}_3$ can act as reducing agent, $H_{3}P{O}_4$ cannot
• C. $H_{3}P{O}_3$ is a monobasic acid.
• D. The $H$ atom of $P–H$ bond in $H_{3}P{O}_3$ is not ionizable in water.

Answer 1

Answer: (A), (B), (D)

The $H$ atom of $P–H$ bond in $H_{3}P{O}_3$ is not ionizable in water.

$H_{3}P{O}_3\stackrel{\Delta }{\to }{H}_{3}P{O}_4+P{H}_3$

$P–H$ bond is responsible for it is reducing character, $H_{3}P{O}_4$ doesnot have.
$H_{3}P{O}_3$ is a dibasic acid in oxyacids of phosphors O–H bond is ionisalbe where as P–H bond is non ionizable.
Thus the Correct options are A,B,D