JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 29 January 2024, Shift 1, Chemistry Q82

Question 82 of 90 in this shift, Chemistry question 22 of 30, Section B.

The number of species from the following which are paramagnetic and with bond order equal to one is ________.

\mathrm{H_2,He_2^+,O_2^+,N_2^{2-},O_2^{2-},F_2,Ne_2^+,B_2}

Official answer

NTA final key.

Chapter: Chemical Bonding and Molecular Structure
Topic: Molecular Orbital Theory
Idea tested: Bond Order Calculation

Same idea in other shifts

Asked 11× in all

8 Apr 2024, Shift 2 · Q83Number of molecules having bond order 2 from the following molecules is ________. $\mathrm{C_2}$ , $\mathrm{O_2}$ , $\mathrm{Be_2}$ ,…MediumNumerical value
27 Jul 2022, Shift 1 · Q85According to MO theory, number of species/ions from the following having identical bond order is__.…MediumNumerical value
27 Jul 2022, Shift 2 · Q62Match **List - I** with **List - II**. List - I (A) $\psi_{MO}=\psi_A-\psi_B$ (B) $\mu=Q\times r$ (C) $\frac{N_b-N_a}{2}$ (D)…EasyMatch the list
30 Jul 2022, Shift 2 · Q52On the basis of MO. theory, the number of molecules from the following which have bond order two, is ________. $\mathrm{O_2}$ ,…MediumNumerical value
24 Jun 2022, Shift 2 · Q63The correct order of bond orders of C $_2^{2-}$ , N $_2^{2-}$ and O $_2^{2-}$ is, respectivelyMediumSingle correct
25 Jun 2022, Shift 1 · Q61Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron ? (A)…MediumOther
4 Aug 2021, Shift 2 · Q54The bond order in $\mathrm{NO^+}$ is ________ . ( integer answer)EasyNumerical value
25 Feb 2021, Shift 1 · Q32According to molecular orbital theory, the species among the following that does not exist is :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.