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  • Help me solve this Which one of the following ions exhibitsd-d transition and paramagnetism as well ?

Which one of the following ions exhibits
d-d transition and paramagnetism as well ?

 

  • Option 1)

    MnO4-

  • Option 2)

    Cr2O7 2-

  • Option 3)

    CrO42-

  • Option 4)

    MnO42-

 

Answers (1)

best_answer

As we learnt that

Diamagnetism -

When substance unaffected by a magnetic field or the central metal atom doesn't have unpaired e- called Diamagnetic substance or character.

- wherein

eg\ \;Sc^{+++}\Rightarrow 3d^{\circ }9s^{2}

No unpaired e-

 

 

Paramagnetism -

When a substance is attracted by a magnetic field or have unpaired  e-  called paramagnetic substance.

- wherein

eg\Rightarrow \:\:Cr^{+}-3d^{5}

5 unpaired e- 

 

 MnO_{4}^{2-} has one unpaired electron so it can show d-d transition andd it is paramagnetic. 

 

 


Option 1)

MnO4-

This is incorrect.

Option 2)

Cr2O7 2-

This is incorrect.

Option 3)

CrO42-

This is incorrect.

Option 4)

MnO42-

This is correct.

Posted by

Aadil

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