Question

The maximum number of $P-H$ bonds are contained in which of the following molecules?

• A. $H_{3}PO_{2}$
• B. $H_{3}PO_{3}$
• C. $H_{3}PO_{4}$
• D. $H_{4}P_{2}O_{7}$

Answer 1

Answer: (A)

$H_{3}PO_{2}$

Answer 2

The structures of the given oxyacids of phosphorus are as

Thus, $H_{3}PO_{2}$ contains the maximum number of $P-H$ bonds.