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Saturday, 31 October

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JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 30 January 2024, Shift 1, Chemistry Q67

Question 67 of 90 in this shift, Chemistry question 7 of 30, Section A.

Diamagnetic Lanthanoid ions are :

(1) $\mathrm{Nd^{3+}}$ & $\mathrm{Ce^{4+}}$
(2) $\mathrm{La^{3+}}$ & $\mathrm{Ce^{4+}}$ Official answer
(3) $\mathrm{Lu^{3+}}$ & $\mathrm{Eu^{3+}}$
(4) $\mathrm{Nd^{3+}}$ & $\mathrm{Eu^{3+}}$

Official answer

Option 2

NTA final key.

Chapter: The d- and f-Block Elements
Topic: f-Block Elements
Idea tested: Magnetic and Spectral Properties

Same idea in other shifts

Asked 2× in all

16 Mar 2021, Shift 2 · Q38Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.