Question

Statement-I: Fluid exerts pressure on the surface of a solid in contact with it. Statement-II: The excess potential energy of molecules at the surface of a liquid leads to surface tension. Which of the following is correct?

• A. Both are true and statement-II is the correct explanation of statement-I
• B. Both are true but statement-II is not correct explanation of statement-I
• C. Statement-I is true but Statement-II is false
• D. Statement-II is true but statement-I is false

Hint:

In fluid mechanics, remember that while pressure and surface tension are related to the behavior of fluids, their underlying causes can be different.

Answer 1

The Correct Option is B

Step 1: Statement-I analysis.
Statement-I is true because fluids do exert pressure on solids in contact with them, as described by Pascal's law. Step 2: Statement-II analysis.
Statement-II is true because excess potential energy of molecules at the surface of a liquid creates surface tension, but it does not explain the pressure exerted by the fluid on the solid surface. Step 3: Conclusion.
Both statements are true, but Statement-II does not explain Statement-I, so option (2) is the correct answer. Final Answer: \[ \boxed{\text{Both are true but statement-II is not correct explanation of statement-I}} \]