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Question
The correct order of hydration enthapies of alkali metal ions is ______.
Options
Li+ > Na+ > Cs+ > Rb+
Na+ > Li+ > K+ > Rb+ > Cs+
Li+ > Na+ > K+ > Rb+ > Cs+
Na+ > Li+ > K+ > Cs+ > Rb+
MCQ
Fill in the Blanks
Solution
The correct order of hydration enthapies of alkali metal ions is Li+ > Na+ > K+ > Rb+ > Cs+.
Explanation:
H.E `prop "Charge"/"Size"`
Li+ > Na+ > K+ > Rb+ > Cs+
L → R charge = const. size ↓ ∴ HE ↓
shaalaa.com
Group 1 Elements - Alkali Metals
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