Formation of Ions

Colours of ions|Magnetic property|Formation of complexes

In the ring test of NO_(3)^(-) ion, Fe^(2+) ion reduces nitrate ion to nitric oxide, which combines with Fe^(2+) (aq) ion to form brown complex . Write the reactions involved in the formation of brown ring.

The formation of positive and negative ions involve I.removal and addition of electrons from neutral atoms respectively II.ionisation enthalpy and electron gain enthalpy respectively choose the correct option