Question

The colour and magnetic nature of manganate ion \[\ce{MnO^{2-}_4}\] is ______.

Options

• green, paramagnetic 

• purple, diamagnetic 

• green, diamagnetic 

• purple, paramagnetic

Answer 1

The colour and magnetic nature of manganate ion \[\ce{MnO^{2-}_4}\] is green, paramagnetic.

Explanation:

Oxidation state of Mn in \[\ce{MnO^{2-}_4}\] is +6.

Mn (+ 6) = 1s² 2s² 2p⁶, 3s² 3p⁶  3d¹, 4s⁰

Hence, manganate ion \[\ce{MnO^{2-}_4}\] is paramagnetic due to presence of unpaired electron. Also, \[\ce{MnO^{2-}_4}\] is green in colour.