In $[{(H_{2} O)}_{4} Co - (O - O) - Co {(H_{2} O)}_{4}] {Cl}_{5}$ complex, Co has $t_{2 g}^{6} e_{g^{0}}$ configuration, this complex is :

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oxidation state of Co is +2

paramagnetic

none of these

diamagnetic

answer is B.

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Detailed Solution

In $[{(H_{2} O)}_{4} Co - (O - O) - Co {(H_{2} O)}_{4}] {Cl}_{5}$ complex, Co has $t_{2 g}^{6} e_{g^{0}}$ configuration has unpaired electron, so this complex is paramagnetic.

Hence, option B is correct.

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