JEE Main 2019 — Chemical Bonding And Molecular Structure Question with Solution
From: JEE Main 2019 (Online) 9th April Morning Slot
Question
Among the following, the molecule expected
to be stabilized by anion formation is :
C2, O2, NO, F2
C2, O2, NO, F2
Choose an option
Show full solutionCorrect option: A
Correct answer
AC2
Step-by-step explanation
C2 has 12 electrons.
Moleculer orbital configuration of C2 is
Bond order of C2 = = 2
C2- has 13 electrons.
Moleculer orbital configuration of C2- is
Bond order of C2- = = 2.5
As we know, higher is the bond order more will be the stability of the molecule.
So we can say, stability of C2 increases when it forms C2- ion.
Moleculer orbital configuration of C2 is
Bond order of C2 = = 2
C2- has 13 electrons.
Moleculer orbital configuration of C2- is
Bond order of C2- = = 2.5
As we know, higher is the bond order more will be the stability of the molecule.
So we can say, stability of C2 increases when it forms C2- ion.
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This is a previous-year question from JEE Main 2019, 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.