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

S c^{+ 3}

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F e^{+ 2}

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T i^{+ 3}

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M n^{+ 2}

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Solution

The correct option is A $S c^{+ 3}$
$S c^{+ 3} ⟶ 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Due to presence of paired electron it will be colourless.

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