JEE Main 2022 · 29 Jul · Shift 1 · Chemistry Q69

ChemistrySingle correct+4 / -1Question 69 of 90

In following pairs, the one in which both transition metal ions are colourless is :

\mathrm{Sc^{3+}}

\mathrm{Zn^{2+}}

\mathrm{Ti^{4+}}

\mathrm{Cu^{2+}}

\mathrm{V^{2+}}

\mathrm{Ti^{3+}}

\mathrm{Zn^{2+}}

\mathrm{Mn^{2+}}

Answer and worked solution

Official answer: A

Configurations. $\mathrm{Sc^{3+}}$ is $d^0$ and $\mathrm{Zn^{2+}}$ is $d^{10}$ : no d-d transitions, so both are colourless.

(A)

Topics:Transition element properties

JEE Main 2022 · 29 Jul · Shift 1, Chemistry question 69