The metal that floats on water without any apparent reaction with it is
Na
Be
Li
Ba
As we learnt in
Storage of lithium -
Can't stored in kerosene, due to its low density it floats on the surface
- wherein
Kept wrapped in paraffin wax
Lithium reacts very slowly with water and it floats on it because of its very low density.
Option 1)
Na
Incorrect
Option 2)
Be
Incorrect
Option 3)
Li
Oorrect
Option 4)
Ba
Incorrect