The oxidation state of phosphorus in hypophosphoric acid is

Correct Answer: 4

Hypophosphoric acid has the formula $$H_4P_2O_6$$.

To find the oxidation state of phosphorus, let it be $$x$$:

$$ 4(+1) + 2(x) + 6(-2) = 0 $$

$$ 4 + 2x - 12 = 0 $$

$$ 2x = 8 $$

$$ x = +4 $$

The oxidation state of phosphorus in hypophosphoric acid is +4.

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