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Question

The incorrect statement is

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

The correct option is C Manganate and permanganate ions are paramagnetic
ManganateMnO24+6 (oxidation state)PermanganateMnO4+7 (oxidation state)

Manganate contains 1 unpaired electron hence it is paramagnetic where as permanganetic contains no unpaired electrons hence it is diamagnetic.

Both have d3s hybridisation hence both have tetrahedral geometry.

Manganate ion is green in colour and permanganate ion is purple in colour.

Also, in manganate and permanganate ions, the π-bonding takes place by overlap of p-orbitals of oxygen and d-orbitals of manganese.

Hence, option (a) is the correct answer.

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