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Friday, 9 October

JEE Main 2017 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 2 April 2017 (offline), Chemistry Q42

Question 42 of 90 in this shift, Chemistry question 12 of 30.

Which of the following species is **not** paramagnetic ?
  1. (1)O2\mathrm{O_2}
  2. (2)B2\mathrm{B_2}
  3. (3)NO
  4. (4)COOfficial answer

Official answer

Option 4

CBSE answer key (25/04/2017, used for result).

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

Same idea in other shifts

Asked 4× in all
  1. 9 Apr 2024, Shift 1 · Q82The total number of species from the following in which one unpaired electron is present, is ________.…MediumNumerical value
  2. 25 Jul 2022, Shift 1 · Q81Among the following species N2, N2+, N2−, N22−, O2, O2+, O2−, O22−\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
  3. 28 Jul 2022, Shift 1 · Q83The number of paramagnetic species among the following is __________.…MediumNumerical value

Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.