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The coordination number in a/an….. Complex may increase to 8.

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The coordination number in a/an….. Complex may increase to 8.
A. cobalt
B. osmium
C. nickel
D. iron
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Correct Answer - B
Os`(Z=76):[Xe]4f^(14),5d^(6),6s^(2)`
Hence, the coordination number in an osmium complex may increasee to `+8`.
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