Which of the following has the highest number | vedclass

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(B) To determine the number of $P-H$ bonds,we examine the structures of the given oxoacids of phosphorus:$1$. $H_3PO_2$ (Hypophosphorous acid): It has

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$H_3PO_2$

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(B) To determine the number of $P-H$ bonds,we examine the structures of the given oxoacids of phosphorus:$1$. $H_3PO_2$ (Hypophosphorous acid): It has two $P-H$ bonds and one $P=O$ bond.$2$. $H_3PO_3$ (Phosphorous acid): It has one $P-H$ bond and one $P=O$ bond.$3$. $H_3PO_4$ (Orthophosphoric acid): It has zero $P-H$ bonds and one $P=O$ bond.$4$. $H_4P_2O_7$ (Pyrophosphoric acid): It has zero $P-H$ bonds.Comparing these,$H_3PO_2$ contains the highest number of $P-H$ bonds (two).

List-$I$ Name of oxo acid	List-$II$ Oxidation state of $P$
$(a)$ Hypophosphorous acid	$(i) +5$
$(b)$ Orthophosphoric acid	$(ii) +4$
$(c)$ Hypophosphoric acid	$(iii) +3$
$(d)$ Orthophosphorous acid	$(iv) +2$
	$(v) +1$

Which of the following has the highest number of $P-H$ bonds?

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