Question

Assertion (A): Water boiling in an open vessel at a fixed temperature is an example of physical equilibrium.
Reason (R): Temperature does not change during the process of boiling. Which of the following is correct?

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

Answer 1

The correct option is D A is false but R is true.

Equilibrium is possible only in a closed vessel. Hence A is false.

Boiling occurs at a constant temperature at a given pressure. Hence R is true.