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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceOtherEasyConceptual

JEE Main 31 January 2024, Shift 1, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below:
  1. (1)A, B, C only
  2. (2)B, C, D only
  3. (3)A and C onlyOfficial answer
  4. (4)B and D only

Official answer

Option 3

NTA final key.

Chapter
Chemical Bonding and Molecular Structure
Topic
Molecular Orbital Theory
Idea tested
LCAO and MO Formation

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2024, Shift 2 · Q61When ψA\psi_A and ψB\psi_B are the wave functions of atomic orbitals, then σ∗\sigma^* is represented by :EasySingle correct
  2. 30 Jan 2024, Shift 1 · Q82The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is ________.EasyNumerical value

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.