QJEEM21Ch4d65: JEE Main 2021 Chemistry - Class 12 JEEM21Ch4d65 Solution: The set having ions which are coloured and paramagnetic both is :

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The set having ions which are coloured and paramagnetic both is :

Accepted Answer

\begin{matrix} C u^{2 +} : [A r] 3 d^{9} 4 s^{0} \\ C r^{3 +} : [A r] 3 d^{3} 4 s^{0} \\ S c^{+} : [A r] 3 d^{1} 4 s^{1} \end{matrix}]

All are coloured and paramagnetic due to presence of unpaired electrons

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