An aqueous solution of NiCl 2 was heated with excess sodium cyanide in presence of strong oxidizing agent to…

An aqueous solution of NiCl2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form Ni(CN)62-. The total change in number of unpaired electrons on metal centre is ___________.

Solution

Ni(CN)62-

Ni+4→d6 strong field ligand

Pairing will be there zero unpaired electron

NiCl2→Ni2+→d8

Change=2

Asked in: JEE Main 2021 (20 Jul Shift 2)

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