Learn

Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceMatch the listMediumApplication

JEE Main 30 January 2024, Shift 1, Chemistry Q66

Question 66 of 90 in this shift, Chemistry question 6 of 30, Section A.

Match List - I with List - II. List - I (Species) List - II (Electronic distribution) (A) Cr+2\mathrm{Cr^{+2}} (I) 3d83d^8 (B) Mn+\mathrm{Mn^{+}} (II) 3d34s13d^3 4s^1 (C) Ni+2\mathrm{Ni^{+2}} (III) 3d43d^4 (D) V+\mathrm{V^{+}} (IV) 3d54s13d^5 4s^1 Choose the correct answer from the options given below :
  1. (1)(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
  2. (2)(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
  3. (3)(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
  4. (4)(A)-(III), (B)-(IV), (C)-(I), (D)-(II)Official answer

Official answer

Option 4

NTA final key.

Chapter
Structure of Atom
Topic
Quantum Numbers
Idea tested
Anomalous Electron Configurations

Same idea in other shifts

Asked 4× in all
  1. 5 Apr 2026, Shift 1 · Q53Identify the correct statements from the following : A. Heisenberg uncertainty principle is applicable to electrons. B. The size of 2px2p_x…EasyOther
  2. 4 Apr 2025, Shift 2 · Q51Consider the ground state of chromium atom (Z=24)(Z=24). How many electrons are with Azimuthal quantum number l=1l=1 and l=2l=2 respectively ?EasySingle correct
  3. 29 Jun 2022, Shift 1 · Q62Which of the following statements are correct ? (A) The electronic configuration of Cr is [Ar] 3d5 4s13d^5\,4s^1. (B) The magnetic quantum…EasyOther

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.