JEE Main 2021 — S Block Elements Question with Solution
From: JEE Main 2021 (Online) 17th March Morning Shift
Question
The correct order of conductivity of ions in water is :
Choose an option
Show full solutionCorrect option: B
Correct answer
BCs+ > Rb+ > K+ > Na+
Step-by-step explanation
As the size of gaseous ion decreases, it get
more hydrated in water and hence, the size of
aqueous ion increases. When this bulky ion
move in solution, it experience greater
resistance and hence lower conductivity.
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This is a previous-year question from JEE Main 2021, covering the S Block Elements 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.