The aqueous solution containing which one of | vedclass

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Question

(A) An ion is colourless if it does not have any unpaired electrons in its $d$-orbitals.$1. _{21}Sc^{3+}: [Ar] 3d^0$. It has no unpaired electrons,so

Vedclass · Accepted Answer

$Sc^{3+}$

Vedclass · Answer

(A) An ion is colourless if it does not have any unpaired electrons in its $d$-orbitals.$1. _{21}Sc^{3+}: [Ar] 3d^0$. It has no unpaired electrons,so it is colourless.$2. _{26}Fe^{2+}: [Ar] 3d^6$. It has $4$ unpaired electrons,so it is coloured.$3. _{22}Ti^{3+}: [Ar] 3d^1$. It has $1$ unpaired electron,so it is coloured.$4. _{25}Mn^{2+}: [Ar] 3d^5$. It has $5$ unpaired electrons,so it is coloured.Therefore,the correct option is $A$.

The aqueous solution containing which one of the following ions will be colourless?

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