When phosphorus is heated with conc. HNO 3 , it reduces the acid to

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When phosphorus is heated with conc. HNO 3 ​ , it reduces the acid to

TestHub · Accepted Answer

When phosphorus is heated with concentrated nitric acid ( $H NO_{3}$ ), it acts as a reducing agent. The nitric acid is reduced to nitrogen dioxide ( $NO_{2}$ ). Phosphorus itself is oxidized to phosphoric acid ( $H_{3} PO_{4}$ ).

The balanced chemical equation is:

$P + 5 H NO_{3} (co n c .) ⟶ H_{3} PO_{4} + 5 NO_{2} + H_{2} O$

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