Question

Consider the following statements.
1. Surface tension of liquid depends on length but not on the area like the elastic property.
2. SI unit of surface tension is N/m.
3. Surface tension is a scalar quantity because it has no specific direction for a given liquid.
Which of the statement(s) given above is/are correct?

• A. 1 and 2
• B. Only 3
• C. 2 and 3
• D. 1, 2 and 3

Answer 1

The correct option is D 1, 2 and 3

Surface tension of a liquid is force per unit length, so it doesn't depends on area. Its SI unit is N/m, and its a scalar quantity as it has no specific direction. The direction normal to the line along which we want to find force is the direction of force due to the Surface Tension.

So all statements are correct.