Select the correct statements about permanganate and manganate.

A $MnO X_{4} X^{2 -}$ ( $K X_{2} MnO X_{4}$ ) is paramagnetic with one unpaired electron
BIn neutral medium $MnO X_{4} X^{-}$ accepts 3 electrons per ion, giving $MnO X_{2}$
CHeating solid $KMnO X_{4}$ at 513 K gives $K X_{2} MnO X_{4}$ , $MnO X_{2}$ and $O X_{2}$
DIn strongly alkaline medium $MnO X_{4} X^{-}$ accepts 5 electrons per ion

Answer: A, B, C

(a) Mn(VI) is

d^{1}

, so one unpaired electron: true. (b)

+ 7 \to + 4

is 3 electrons: true. (c)

2 KMnO X_{4} \to K X_{2} MnO X_{4} + MnO X_{2} + O X_{2}

: true. (d) False: in strongly alkaline medium only

MnO X_{4} X^{-} + e^{-} \to MnO X_{4} X^{2 -}

occurs (1 electron).