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

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

AMUAMU 2010The p-Block Elements - Part2

Solution:

The structures of the given oxyacids of phosphorus are as
image
Thus, $H_{3}PO_{2}$ contains the maximum number of $P-H$ bonds.