\(KMnO_{4}\) on heating alone decomposes as
(A) \(MnO_{2}\)
(B) \(K_{2}MnO_{4}\)
(C) \(O_{2}\)
(D) All are formed

In acidic medium \(KMnO_{4}\) oxidises oxalic acid to \(CO_{2}\).The catalyst in the reactions is (A) \(MnO_{4}^{2-}\) (B) \(Mn^{+2}\) (c) \(CO_{2}\) (D) \(CrO_{4}^{2-}\)

Calculate the O.N of Mn in (a) Mn_(4)^(-) (b) K_(2)MnO_(4) (c ) MnO_(2)

KMnO_(4) overset(Delta) to K_(2)MnO_(4)+MnO_(2)+O_(2)uarr

K_(2)MnO_(4)+H^(+) to KMnO_(4)+MnO_(2)darr

MnO_(2)+2KOH+(1)/(2)O_(2) to K_(2)MnO_(4)+H(2)O