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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 31 August 2021, Shift 1, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

Which one of the following lanthanides exhibits +2+2 oxidation state with diamagnetic nature ? (Given Z for Nd=60=60, Yb=70=70, La=57=57, Ce=58=58)
  1. (1)Nd
  2. (2)YbOfficial answer
  3. (3)La
  4. (4)Ce

Official answer

Option 2

NTA final key.

Chapter
The d- and f-Block Elements
Topic
f-Block Elements
Idea tested
Identifying Diamagnetic Lanthanide Ions

Same topic in other shifts

All f-Block Elements questions
  1. 4 Apr 2026, Shift 1 · Q60The correct statements among the following are, A. Mo(VI) and W(VI) are less stable than Cr(VI). B. Ce4+\mathrm{Ce^{4+}} and…HardOther
  2. 4 Apr 2026, Shift 2 · Q59Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number: Eu-63, Gd-64, Dy-66, Ho-67, Tm-69,…MediumOther
  3. 6 Apr 2024, Shift 1 · Q69The number of element from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and LuEasySingle correct
  4. 9 Apr 2024, Shift 1 · Q87Number of colourless lanthanoid ions among the following is ________. Eu3+,Lu3+,Nd3+,La3+,Sm3+\mathrm{Eu^{3+}, Lu^{3+}, Nd^{3+}, La^{3+}, Sm^{3+}}MediumNumerical value
  5. 27 Jan 2024, Shift 1 · Q68The electronic configuration for Neodymium is : [Atomic Number for Neodymium 60]EasySingle correct
  6. 30 Jan 2024, Shift 1 · Q67Diamagnetic Lanthanoid ions are :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.