Question

The colour and magnetic nature of manganate ion $(MnO^{2-}_4)$ is

• A. green, paramagnetic
• B. purplc, diamagnetic
• C. green, diamagnetic
• D. purple, paramagnetic

Answer 1

Answer: (D)

purple, paramagnetic

Answer 2

In $MnO_4^{-2}$ oxidation state of $Mn$ is $+6$
Its electronic configuration is $1 s^{2} 2 s^{2} 2p^{6} 3 s^{2} 3 p^{6} 3 d^{1}, 4 s^{0}$
Due to presence of unpaired electron it is coloured and paramagnetic. And it's colour is purple.