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JEE Main202120 Jul 2021Evening ShiftChemistryCoordination CompoundsActual

An aqueous solution of NiCl 2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form Ni ( CN ) 6 2 - . The total change in number of unpaired electrons on metal centre is ___________.

Correct answer

0

Step-by-step solution

Ni ( CN ) 6 2 - Ni + 4 → d 6 strong field ligand Pairing will be there zero unpaired electron NiCl 2 → Ni 2 + → d 8 Change = 2

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