JEE Main 2026 · 8 Apr · Shift 2 · Chemistry Q60

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ChemistrySingle correct+4 / -1Question 60 of 75

Given below are two statements :

Statement I : The number of pairs among $[\ce{Ti^4+},\ \ce{V^2+}]$ , $[\ce{V^2+},\ \ce{Mn^2+}]$ , $[\ce{Mn^2+},\ \ce{Fe^3+}]$ and $[\ce{V^2+},\ \ce{Cr^2+}]$ in which both ions are coloured is 3.

Statement II : The number of pairs among $[\ce{La^3+},\ \ce{Yb^2+}]$ , $[\ce{Lu^3+},\ \ce{Ce^4+}]$ and $[\ce{Ac^3+},\ \ce{Lr^3+}]$ ions in which both are diamagnetic is 3.

In the light of the above statements, choose the correct from the options given below :

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Statement I is incorrect but Statement II is correct

Answer and worked solution

Official answer: A

Statement I. $\ce{Ti^4+}$ ( $d^0$ ) is colourless, so the first pair fails. $\ce{V^2+}$ ( $d^3$ ), $\ce{Mn^2+}$ ( $d^5$ ), $\ce{Fe^3+}$ ( $d^5$ ) and $\ce{Cr^2+}$ ( $d^4$ ) are all coloured, so the other 3 pairs qualify. Correct.

Statement II. All six ions have empty or full f shells: $\ce{La^3+}$ ( $4f^0$ ), $\ce{Yb^2+}$ ( $4f^{14}$ ), $\ce{Lu^3+}$ ( $4f^{14}$ ), $\ce{Ce^4+}$ ( $4f^0$ ), $\ce{Ac^3+}$ ( $5f^0$ ), $\ce{Lr^3+}$ ( $5f^{14}$ ). All diamagnetic: 3 pairs. Correct.

(A)

Topics:Lanthanoids Transition element properties

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JEE Main 2026 · 8 Apr · Shift 2, Chemistry question 60