JEE Main 2007 — Chemical Bonding And Molecular Structure Question with Solution
From: AIEEE 2007
Question
The charge/size ratio of a cation determines its polarizing power. Which one of the following
sequences represents the increasing order of the polarizinig order of the polarizing power of the
cationic species, K+, Ca2+, Mg2+, Be2+?
Choose an option
Show full solutionCorrect option: B
Correct answer
BK+ < Ca2+ < Mg2+ < Be2+
Step-by-step explanation
As charge/size ratio of a cation determines its polarizing power so high charge and small size of the cations increases
polarisation.
As the size of the given cations decreases as
K+ > Ca2+ > Mg2+ > Be2+
Hence, polarising power decreases as
K+ < Ca2+ < Mg2+ < Be2+
As the size of the given cations decreases as
K+ > Ca2+ > Mg2+ > Be2+
Hence, polarising power decreases as
K+ < Ca2+ < Mg2+ < Be2+
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This is a previous-year question from JEE Main 2007, 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.