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01/10/2020 4:00 pm
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The correct order of hydration energy of alkali is
(a) Li +> Na +> K + > Rb +
(b) Rb + > K + > Na + > Li +
(c) Na + > K + > Li + > Rb +
(d) K + > Rb + > Na + > Li +
1 Answer
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01/10/2020 4:03 pm
(a) Li +> Na +> K + > Rb +
Explanation:
Hydration energy ∝ 1/size
In a group, size increases on going down the group from top to bottom i.e.,
Rb + > K + > Na + > Li +
∴ Increasing order of hydration energy
Li+> Na+> K+ > Rb+