Which of the following ionic species will imp | vedclass

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(D) The colour of an aqueous solution of transition metal ions is generally due to the presence of unpaired $d$-electrons,which allow for $d-d$ transi

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$Cr^{3+}$

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(D) The colour of an aqueous solution of transition metal ions is generally due to the presence of unpaired $d$-electrons,which allow for $d-d$ transitions.$1$. $Ti^{4+}$ $(3d^0)$: No unpaired electrons,colourless.$2$. $Cu^{+}$ $(3d^{10})$: No unpaired electrons,colourless.$3$. $Zn^{2+}$ $(3d^{10})$: No unpaired electrons,colourless.$4$. $Cr^{3+}$ $(3d^3)$: Contains $3$ unpaired electrons,hence it is coloured.Therefore,the correct option is $(D)$.

Which of the following ionic species will impart colour to an aqueous solution?

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