Question

"Explain surface tension on the basis of molecular theory."

Answer 1

Surface tension has been explained by molecular theory matter .According to this theory conhension force among liquid molecular are responsible for the phenomenon of surface tension. The molecule tension well inside the liquid are attracted equally in all direction by other molecules......

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Answer 2

The liquid molecules which are below the surface are in equilibrium.  The liquid molecules which are at the surface are attracted by other molecules in downward direction. So, a force is originated to balance the surface molecules which is equal but opposite in direction to the downward force. This force is called surface tension.