JEE Main 2015ChemistryClassification of Elements and Periodicity in PropertiesMediumMCQ

JEE Main 2015 — Classification of Elements and Periodicity in Properties Question with Solution

JEE Main 2015 (04 Apr)

Question

The ionic radii (in  Å) of N3-, O2-  and  F-  are respectively:

Choose an option

Show full solutionCorrect option: D
Correct answer
D1.71, 1.40 and 1.36

Step-by-step explanation

As Z e ↑ ionic radius decreases for isoelectronic species.

Z=number of protonse=number of electrons

N 3 - Z e = 7 1 0

O 2 - Z e = 8 1 0

F - Z e = 9 1 0

Trend of ionic radius: N 3 - > O 2 - > F -

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About this question

This is a previous-year question from JEE Main 2015, 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.