In which of the following ions,d-d transition | vedclass

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(A) The $d-d$ transition is possible only in ions that have partially filled $d$-orbitals ($d^1$ to $d^9$ configuration).$1$. $Ti^{4+}$: The electroni

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$Ti^{4+}$

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(A) The $d-d$ transition is possible only in ions that have partially filled $d$-orbitals ($d^1$ to $d^9$ configuration).$1$. $Ti^{4+}$: The electronic configuration is $[Ar] 3d^0$. Since there are no electrons in the $d$-orbital,$d-d$ transition is not possible.$2$. $Cr^{3+}$: The electronic configuration is $[Ar] 3d^3$. It has partially filled $d$-orbitals,so $d-d$ transition is possible.$3$. $Mn^{2+}$: The electronic configuration is $[Ar] 3d^5$. It has partially filled $d$-orbitals,so $d-d$ transition is possible.$4$. $Cu^{2+}$: The electronic configuration is $[Ar] 3d^9$. It has partially filled $d$-orbitals,so $d-d$ transition is possible.Therefore,the correct option is $A$.

In which of the following ions,$d-d$ transition is not possible?

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