7. Which of the following compounds has an oxidation state of +5 phosphorus? a) Peroxodiphosphoric acid b) Hypophosphorous acid c) Orthophosphorous acid d) Hypophosphoric acid
Answer: a Explanation: Phosphorus in peroxodiphosphoric acid has an oxidation state of +5. Phosphorus has an oxidation state of +1 in hypophosphorus acid, +3 in orthophosphorous acid, and +4 in hypophosphoric acid.
