The correct order of hydration enthalpie...

The correct order of hydration enthalpies of alkali metal ions is:

A

`Li^+ gt Na^+ gt K^+ gt Cs^+ gt Rb^+`

B

`Na^+ gt Li^+ gt K^+ gt Cs^+ gt Rb^+`

C

`Li^+ gt Li^+ gt K^+ gt Rb^+ gt Cs^+`

D

`Li^+ gt Na^+ gt K^+ gt Rb^+ gt Cs^+`

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The correct Answer is:

D

Hydration decreases with decrement in charge density of ion.

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