JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumApplication

JEE Main 4 April 2024, Shift 1, Chemistry Q82

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

Number of molecules/species from the following having one unpaired electron is ________.

\mathrm{O_2}

\mathrm{O_2^{-1}}

, NO,

\mathrm{CN^{-1}}

\mathrm{O_2^{2-}}

Official answer

NTA final key.

Chapter: Chemical Bonding and Molecular Structure
Topic: Molecular Orbital Theory
Idea tested: Magnetic Property Prediction

Same idea in other shifts

Asked 9× in all

9 Apr 2024, Shift 1 · Q82The total number of species from the following in which one unpaired electron is present, is ________.…MediumNumerical value
13 Apr 2023, Shift 1 · Q62In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?MediumSingle correct
25 Jul 2022, Shift 1 · Q81Among the following species $\mathrm{N_2,\ N_2^{+},\ N_2^{-},\ N_2^{2-},\ O_2,\ O_2^{+},\ O_2^{-},\ O_2^{2-}}$ the number of species…MediumNumerical value
28 Jul 2022, Shift 1 · Q83The number of paramagnetic species among the following is __________.…MediumNumerical value
4 Aug 2021, Shift 1 · Q32Consider the following species $\mathrm{B_2, C_2, S_2, NO, O_2^{2-}}$ Which set represents all paramagnetic species?MediumSingle correct
31 Aug 2021, Shift 2 · Q54According to molecular orbital theory, the number of unpaired electron(s) in $\mathrm{O_2^{2-}}$ is __________.EasyNumerical value
9 Jan 2020, Shift 1 · Q27If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :MediumSingle correct
2 Apr 2017 (offline) · Q42Which of the following species is **not** paramagnetic ?EasySingle 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.