Write a balanced half-reaction for the oxidation of gaseous nitric oxide to aqueous nitrous acid in basic aqueous solution. Be sure to add physical state symbols where appropriate.

Ans-NO(g) +OH-(aq) =HNO2(aq) +e-

Explanation:

NO(g) + H2O(l) =HNO2(aq)  

Hydrogen is balanced by adding H+

NO(g) + H2O(l) =HNO2(aq)  + H+

Charge is balanced by adding electron to that side of where charge is more

NO(g) + H2O(l) =HNO2(aq)  + H+ +e-

For reaction to be occur in basic medium ,need to add OH- both side of reaction

OH-(l) + NO(g) + H2O(l) =HNO2(aq)  + H+ +e-  +OH-

OH-(l)+ NO(g) + H2O(l) =HNO2(aq)  + H2O(l) +e-  

NO(g) + OH-(l)   = HNO2(aq)  + e-

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