JEE Main 2013 — Classification of Elements and Periodicity in Properties Question with Solution
JEE Main 2013 (22 Apr Online)
Question
The order of increasing sizes of atomic radii among the elements O, , Se and As is :
Choose an option
Show full solutionCorrect option: C
Correct answer
CO S As
Step-by-step explanation
On moving down in a group atomic radii increases due to successive addition of extra shell hence
Further As is in group 15 having one less electron in its orbital hence have higher atomic radii than group 16 elements.
i.e.,
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This is a previous-year question from JEE Main 2013, covering the Classification of Elements and Periodicity in Properties 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.