Question

Which of the following statement is incorrect?

• A. The force of attraction between the molecules of the same substance is called cohesive force.
• B. Surface tension is the effect of cohesive force.
• C. A strong force of cohesion forms water droplets on any surface.
• D. None of these.

Answer 1

The correct option is D None of these.

Cohesive force is force of attraction between molecules of the same substance.
$\Rightarrow$Strong cohesive forces lead to larger intermolecular attraction by bulk molecules for the liquid molecules at surface, compared to low adhesive force of attraction by air molecules above the liquid surface.
$\therefore$ Liquid surface behaves as a stretched membrane and surface tension is generated.

A strong force of cohesion helps to form water droplets on any surface otherwise it will spread all over the surface.
$\therefore$ Option $\left(d\right)$ is correct.