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JEE Main 20 July 2021 Shift 2 Solved Paper

Section: Chemistry
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Question : 59 of 90
 
Marks: +1, -0
An aqueous solution of NiCl2 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 _______.
[20 Jul 2021 Shift 2]
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