(i) The reaction involuves the decomposition of cyanogen `(CN)_(2)` in the alkaline medium.
(ii) Both `(CN_(2))` i.e cyanogen and `(CN^(-))` i.e cyuanide ons are pseudo halogens in nature i.e they behave like halogens
(iii) Cyanogen undergoes disproportionation in the rection.It undergo simutanous increase and decrease in O.N the species involved.
(iv) It is an expample of redox reaction