Q9 / 75 · JEE Main 2020 (03 Sep Shift 2) · Chemistry

The incorrect statement is:

A
Manganate and permanganate ions are tetrahedral
B
In manganate and permanganate ions, the $π$ -bonding takes place by overlap of p-orbitals of oxygen and d-orbitals of maganese
Correct answer
C
Manganate and permanganate ions are paramagnetic
D
Manganate ion is green in colour and permanganate ion is purple in colour

Solution

Manganate

${MnO}_{4}^{2 -}$

Paramagnetic, green in colour,
Tetrahedral $&$ contains $pπ - dπ$ bond

Permanganate

${MnO}_{4}^{Θ}$

Diamagnetic, purple in colour,
Tetrahedral $&$ contains $pπ - dπ$ bond

Hence, the correct answer is option: 'C'.