Question

Assertion (A): The viscosity of a liquid decreases with rise in temperature.
Reason (R): Viscosity of a liquid is the property of the liquid by virtue of which it opposes the relative motion amongst its different layers.

• A. A and R are true and R is the correct explanation of A.
• B. A and R are true, but R is not the correct explanation of A.
• C. A is true but R is false.
• D. Both A and R are false.

Answer 1

The correct option is B

A and R are true, but R is not the correct explanation of A.

Viscosity is a property of fluid to oppose relative motion between different layers. Reason is correct.
Also viscosity decreases with rise in temperature. Assertion is true.
Hence Assertion and Reason are correct but Reason is not the correct explanation of Assertion.