Question

8.
Which of the following is the origin of Surface
Tension ?
(A)
Only cohesive force
(B)
Only adhesive force
(C)
Both (A) and (B)
(D)
None of the above​

Answer 1

Answer:

A) only cohesive force

Explanation:

The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules: A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions.

Answer 2

Answer:

The correct option is (C) Both (A) and (B)

Explanation:

• The quality of a liquid's surface that makes it resistant to external forces because of the cohesiveness of its molecules is called Surface Tension.
• Cohesive forces are exerted on molecules on the surface of a liquid by surrounding liquid molecules acting downward, and adhesive forces are produced by surrounding gaseous molecules acting upward.
• Hence, Cohesive and Adhesive, Both forces are origin of Surface Tension.
• In physics, cohesion refers to the intermolecular attraction that exists between two adjacent parts of a substance, especially one that is solid or liquid.
• A piece of substance is held together by this force. Adhesion is a word for the intermolecular forces that act when two different substances come into contact.

#SPJ2