Which of the following oxoacids of phosphorus | vedclass

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(A) The chemical formulas and oxidation states of phosphorus in the given oxoacids are as follows:$1$. Hypophosphorous acid $(H_3PO_2)$: $3(+1) + x +

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Hypophosphorous acid

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(A) The chemical formulas and oxidation states of phosphorus in the given oxoacids are as follows:$1$. Hypophosphorous acid $(H_3PO_2)$: $3(+1) + x + 2(-2) = 0 \implies 3 + x - 4 = 0 \implies x = +1$.$2$. Orthophosphoric acid $(H_3PO_4)$: $3(+1) + x + 4(-2) = 0 \implies 3 + x - 8 = 0 \implies x = +5$.$3$. Pyrophosphoric acid $(H_4P_2O_7)$: $4(+1) + 2x + 7(-2) = 0 \implies 4 + 2x - 14 = 0 \implies 2x = 10 \implies x = +5$.$4$. Metaphosphoric acid $(HPO_3)$: $1(+1) + x + 3(-2) = 0 \implies 1 + x - 6 = 0 \implies x = +5$.Comparing the oxidation states,hypophosphorous acid has the lowest oxidation state of $+1$.

Which of the following oxoacids of phosphorus has the lowest oxidation state of phosphorus?

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