JEE Main 2013ChemistryChemical Bonding and Molecular StructureEasyMCQ

JEE Main 2013 — Chemical Bonding and Molecular Structure Question with Solution

JEE Main 2013 (07 Apr)

Question

Which one of the following molecules is expected to exhibit paramagnetic behaviour?

Choose an option

Show full solutionCorrect option: A
Correct answer
AO2

Step-by-step explanation

M.O. Electronic configuration.

O 2 =σ1 s 2 < σ * 1 s 2 <σ2 s 2 < σ * 2 s 2 <σ2 p z 2 <π2 p y 2 =π2 p x 2 < π * 2 p y 1 = π * 2 p x 1     Paramagnetic
O2-2=σ1 s 2 < σ * 1 s 2 <σ2 s 2 < σ * 2 s 2 <σ2 p z 2 <π2 p y 2 =π2 p 2x < π * 2 p y 2 = π * 2 p x 2  Diamagnetic
C2 =σ1 s 2 < σ * 1 s 2 <σ2 s 2 < σ * 2 s 2 <π2 p x 2 =π2 p y 2        Diamagnetic

N 2 =σ1 s 2 < σ * 1 s 2 <σ2 s 2 < σ * 2 s 2 <π2 p x 2 =π2 p y 2 <σ2 p z 2      Diamagnetic
 
 O2 has unpaired e- so it is paramagnetic.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Chemical Bonding and Molecular Structure chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2013, covering the Chemical Bonding and Molecular Structure chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.