Question

Tick (✔) the most appropriate answer.

The intermolecular forces of attraction between the particles of same substance is called-

• A. adhesive forces
• B. attractive forces
• C. cohesive forces
• D. any of these

Answer 1

The correct option is C

cohesive forces

Explanation for the correct option:

(C) cohesive forces

• The mutual attraction between molecules of the same kind/substance is known as a cohesive force.
• For example- Solids have high cohesive properties that keeps them bonded together whereas gases have weak cohesion.
• Water has both cohesive and adhesive properties. Water molecules stick to each other to form a sphere. This is the result of cohesive forces.

The explanation for the incorrect options:

(A) adhesive forces

• Adhesion is the property of molecules of different surfaces/substances to cling to each other.
• For example- As water has both cohesive and adhesive properties. When water is contained in a tube, the water molecules touching the walls of the container are at a higher level (shown as concave meniscus). This is due to the adhesive force between the water molecules and the molecules of the container.

(B) attractive forces

• Both the cohesive and adhesive forces are inter-molecular forces of attraction.

Therefore, option (C) is correct. The intermolecular forces of attraction between the particles of the same substance are called cohesive forces.