Question

An oxyacid of phosphorus which is a white deliquescent crystalline solid can be prepared by the hydrolysis of $P_2{O}_3$. The formula of the oxyacid is:

• A. $H_{3}P{O}_4$
• B. $H_{3}P{O}_3$
• C. $H_{3}P{O}_2$
• D. $H_4{P}_2{O}_7$

Answer 1

The correct option is A $H_{3}P{O}_4$

Phosphoric acid is an oxyacid of phosphorous and is prepared by hydrolysis of phosphorous trioxide (P${}_4$O${}_6$). Phosphorous acid is dibasic in nature.

P${}_4$O${}_6$ + 6H${}_2$O$\to$ 4H${}_3$PO${}_3$

Hence, the correct option is $\text{A}$