Question

find incorrect statement about manganate and permanganate Ions
1) both manganate and paramanganate ions or paramagnetic
2) manganate ion is green in colour while permanganate ion is purple in colour
3) both manganate and permanganate have tetrahedral shape
4) In manganate and paramanganate ions Mn from pπ-dπ bond with oxygen. ​

Answer 1

we have to find the incorrect statement about magnate and permanganate ions.

Solution : option (1) both manganate and paramanganate ions are paramagnetic.

let's discuss about magnetic character of manganate and permanganate.

both manganate and permanganate are tetrahedral in shape but their colours are different because manganate has one unpaired electron and permanganate has no unpaired electron.

we know, a molecule is paramagnetic when it has some unpaired electron and is diamagnetic when it has no unpaired electrons.

Therefore manganate ion is paramagnetic and permanganate ion is diamagnetic.

Therefore option (1) is incorrect statement.