The metal ion which does not form coloured co | vedclass

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(C) The electronic configuration of $Zn$ is $[Ar] 3d^{10} 4s^2$. In its common oxidation state of $+2$,the configuration is $[Ar] 3d^{10}$.Since the $

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Zinc

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(C) The electronic configuration of $Zn$ is $[Ar] 3d^{10} 4s^2$. In its common oxidation state of $+2$,the configuration is $[Ar] 3d^{10}$.Since the $3d$ subshell is completely filled,there are no unpaired electrons present.Due to the absence of unpaired electrons,$d-d$ transitions are not possible.Therefore,$Zn^{2+}$ ions do not form coloured compounds.

The metal ion which does not form coloured compounds is

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