Consider the following statements: A. A water drop in a vacuum is perfectly spherical. B. The shape of a water drop is due to the action of gravity. C. Soaps and detergents drastically decrease the surface tension of water. D. As temperature increases, surface tension also increases and becomes maximum at critical temperature. Which of the above statements are correct Select the code for the correct answer from the options given below:?

A, B, C and D
B, C and D only
A, B and C only
A and C only

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : A and C only

The correct answer is A and C only.

The spherical nature of water and oil drops is due to the phenomena of surface tension. Hence statement A is correct and B is incorrect.
On smaller raindrops, the surface tension is stronger than in larger drops.
For a given volume of a liquid, a sphere has the least surface area.
The more the surface area of an object, the more is its surface energy.
When detergent is added to water, it decreases the surface tension of the water. Hence statement C is correct.
- Surfactants are capable of reducing surface tension drastically.
As the temperature increases, Surface tension decreases because cohesive forces decrease with an increase in molecular thermal activity. Hence statement D is incorrect.

4 views Answered 2022-09-04 04:29

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