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Question

Which one of the following alkali metals gives hydrated salts?

A
Li
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B
Na
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C
K
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D
Cs
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Solution

The correct option is B Li
Among alkali metal ions, Li+ is the smallest. Therefore it has a maximum degree of hydration than any other alkali metals.{hydration energy is inversely proportional to the size of Cation.}

Hence, the correct option is A

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