JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 13 April 2023, Shift 1, Chemistry Q70

Question 70 of 90 in this shift, Chemistry question 10 of 30, Section A.

The pair of lanthanides in which both elements have high third - ionization energy is:

(1)Eu, Gd
(2)Eu, YbOfficial answer
(3)Dy, Gd
(4)Lu, Yb

Official answer

Option 2

NTA final key.

Chapter: The d- and f-Block Elements
Topic: f-Block Elements
Idea tested: Lanthanide Oxidation States

Same idea in other shifts

Asked 4× in all

26 Jun 2022, Shift 2 · Q69The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?MediumSingle correct
28 Jun 2022, Shift 1 · Q68Which one of the lanthanoids given below is the most stable in divalent form?EasySingle correct
26 Feb 2021, Shift 1 · Q38Which one of the following lanthanoids does not form $\mathrm{MO_2}$ ? [M is lanthanoid metal]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.