Question

Based on the given figure, the number of correct statement/s is/are _______

A. Surface tension is the outcome of equal attractive and repulsive forces acting on the liquid molecule in bulk
B. Surface tension is due to uneven forces acting on the molecules present on the surface
C. The molecule in the bulk can never come to the liquid surface
D. The molecules on the surface are responsible for vapour pressure if the system is a closed system

Answer 1

Correct Answer: 2

The correct options are:
B: Surface tension arises due to uneven forces acting on the molecules present at the surface. Molecules at the surface of a liquid experience a net inward force because they are not surrounded by similar molecules on all sides. This imbalance results in the liquid's surface behaving as if it were under tension. 

D: The molecules at the surface are responsible for vapor pressure in a closed system. In a closed system, molecules at the surface of the liquid are able to escape into the vapor phase, contributing to the vapor pressure. The equilibrium between the liquid and vapor phases determines the vapor pressure.