Which of the following is paramagnetic as well as coloured ion?
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$27Cu ⟶ 4s^23d^7$
$Cu^{2+ }⟶ 4s^03d^7$
Due to the presence of unpaired electrons, the transition of $e^−$ is easier hence it shows color.
$Cu^{2+ }⟶ 4s^03d^7$
Due to the presence of unpaired electrons, the transition of $e^−$ is easier hence it shows color.
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