KMnO4 is an oxidising agent MnO4¯ + 8H+ + 5e- → Mn2+ + 4H2O ] multiply this equation by 2 NO2- + H2O → NO3- + 2H+ + 2 e- ] multiply this equation by 5 Add these two half reactions : 2 MnO4¯ + 5 NO2- + 6 H+ → 2Mn2+ + 5 NO3- + 3H2O

MnO₄ ^-+ NO₂ ^-+ H⁺

KMnO₄ is an oxidising agent.
MnO₄¯ + 8H⁺ + 5e^- → Mn²⁺ + 4H₂O ] multiply this equation by 2
NO₂^-+ H₂O → NO₃^- + 2H⁺ + 2 e^-] multiply this equation by 5
Add these two half reactions :
2 MnO₄¯ + 5 NO₂^-+ 6 H⁺ → 2Mn²⁺ + 5 NO₃^- + 3H₂O

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MnO4 -+ NO2 -+ H+

MnO₄ ^-+ NO₂ ^-+ H⁺