Redox Reactions

Calcium and Magnesium metals are manufactured by electrolysis of aqueous solutions of their salts

The oxo-anion $\mathrm{ClO}_3^{-}$does not undergo disproportionation reaction

Nitride ion $\mathrm{N}^{-3}$ cannot act as an oxidising agent

In alkaline medium the reduction of $\mathrm{MnO}_4^{-}$ion involves gain of 5 electrons