Redox and Equivalent ConceptHard

Question

Phosphorus has oxidation state of +3 in

Options

A.phosphorus acid

B.orthophosphoric acid

C.metaphosphoric acid

D.pyrophosphoric acid

Solution

Phosphorus acid: H₃PO₃, oxidation state of P = +3.

Orthophosphoric acid: H₃PO₄, oxidation state of P = +5.

Metaphosphoric acid: HPO₃, oxidation state of P = +5.

Pyrophosphoric acid: H₄P₂O₇, oxidation state of P = +5.

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