JEE Mains 03-Sep-2020 Shift 2 Solved Paper

Option 1 ) Manganate ⇒MnO42− ,
Permanganate ⇒MnO4−
After excitation
2×2pπ−3dπσ2×2 Pπ−3 dπ
1×2 Pπ−4 Pπ
(2) MnO42−⇒ green
MnO4−⇒ purple/violet
(3) Manganate contains 1 unpaired electron hence it is paramagnetic where as permanganetic contains no unpaired electrons hence it is diamagnetic.
(4) Both have d3 s hybridisation hence both have tetrahedral geometry.