Question

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

A. Surface tension is the outcome of equal attractive and repulsion 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

A. Incorrect. Surface tension is not due to equal attractive and repulsive forces in the bulk. Molecules in bulk experience balanced forces from all sides.

B. Correct. Surface tension arises because surface molecules experience an imbalance of forces—stronger inward attraction, creating surface tension.

C. Incorrect. Molecules in the bulk can come to the surface, driven by thermal motion and diffusion.

D. Correct. Surface molecules are responsible for vapour pressure, as they can escape into the vapor phase in a closed system.

Number of correct statements: 2

Conclusion: This solution correctly identifies 2 valid statements and aligns with the range of 2 to 2.