JEE Main 2019 — S Block Elements Question with Solution
From: JEE Main 2019 (Online) 8th April Morning Slot
Question
The correct order of hydration enthapies of alkali metal ions is :
Choose an option
Show full solutionCorrect option: D
Correct answer
DLi+ > Na+ > K+ > Rb+ > Cs+
Step-by-step explanation
Hydration energy/enthalpy
Smaller the size more is hydration energy.
Li+ having minimum radius so maximum hydration energy.
Correct order is :
Li+ > Na+ > K+ > Rb+ > Cs+
Smaller the size more is hydration energy.
Li+ having minimum radius so maximum hydration energy.
Correct order is :
Li+ > Na+ > K+ > Rb+ > Cs+
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This is a previous-year question from JEE Main 2019, 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.