AIPMT PRELIMS2003Chemistry-Coordination Compounds
AIPMT PRELIMS 2003 Chemistry Electronic Configuration MCQ Question
Type: MCQ-numerical-Medium-Class 12
The number of unpaired electrons in the complex ion [CoF₆]³⁻ is: (A + No = Co = 27)
A
2
B
3
C
4
D
zero
Correct Answer
Option C
Detailed Explanation
In [CoF₆]³⁻, Co is in the +3 oxidation state and has a d⁶ configuration, leading to three unpaired electrons.
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