Question

A small air bubble is at the inner surface of the bottom of a beaker filled with cold water. Now water of the beaker is heated. The size of bubble increases. The reason for this may be
A. Increases in the saturated vapour pressrue of water
B. Root mean square velocity of air molecules inside the bubble increases
C. Decreases in surface tension of water
D. all of the above

Answer 1

Correct Answer - D

Answer 2

If water of the beaker is heated.

1. Because of boiling there is a increase in saturated vapour pressure of the water therefore size of the bubble increases.

2. Increase in temperature causes the decrease in Surface tension.

3. Also increasing temperature increases the root mean square velocity of air molecules inside the bubble.

There for,
Correct answer : d. all of the above