Coordination Compounds Ques 67

67. The number of unpaired electrons in the complex ion $[CoF_6]^{3-}$ is (Atomic no.: $Co=27$ )

[2003]

(a) Zero

(b) 2

(c) 3

(d) 4

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Answer:

Correct Answer: 67.(d)

Solution:

(d) Co here is in +3 oxidation state

Unpaired electrons $=4$ and $s p^{3} d^{2}$ hybridisation and octahedral shape.