1. Tardigrade
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  4. The coordination number, oxidation number and the number of d-electrons in the metal ion of the complex [COCl2 -(en)2]Cl, are respectively (atomic number of Co=27)

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Q. The coordination number, oxidation number and the number of d-electrons in the metal ion of the complex $[COCl_2 -(en)_2]Cl$, are respectively (atomic number of $Co=27$)

KEAMKEAM 2015Coordination Compounds

Solution:

The complex is: $\left[ CoCl _{2}(e n)_{2}\right] Cl$.
Complex is octahedral, $CN$ of $CO$ is $6$
$C o^{3+}$ has $3 d^{6}$ electronic configuration is $+3$