Select the diamagnetic complex ion among the following complexes (Atomic number : Fe=26,Co=27)
A
K3[Fe(CN)6]
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B
[Co(NH3)6]Cl3
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C
K3[FeF6]
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D
K3[CoF6]
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Solution
The correct option is B[Co(NH3)6]Cl3 Coordination compound/ion having unpaired electron is paramagnetic in nature while if it has all the electrons paired, it is diamagnetic. Therefore, [Co(NH3)6]Cl3 is diamagnetic in nature.