Which among the following is colored?

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Question

(C) $CuCl$ contains $Cu^+$ ion with $3d^{10}$ configuration. All electrons are paired,so it is colorless.$ScCl_3$ contains $Sc^{3+}$ ion with $3d^0$ c

Vedclass · Accepted Answer

$CuCl_2$

Vedclass · Answer

(C) $CuCl$ contains $Cu^+$ ion with $3d^{10}$ configuration. All electrons are paired,so it is colorless.$ScCl_3$ contains $Sc^{3+}$ ion with $3d^0$ configuration. It has no unpaired electrons,so it is colorless.$CuCl_2$ contains $Cu^{2+}$ ion with $3d^9$ configuration. It has one unpaired electron,which allows for $d-d$ transitions,making it colored.$TiCl_4$ contains $Ti^{4+}$ ion with $3d^0$ configuration. It has no unpaired electrons,so it is colorless.Therefore,$CuCl_2$ is the colored compound.

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