Question

A small air bubble is at the inner surface of the bottom of a breaker filled with cold water. Now water of the beaker is heated. The size of bubble increases. The reason for this may be

• A. Increase in the saturated vapour pressure of water
• B. Root mean square velocity of air molecules inside the bubble increases
• C. Decrease in surface tension of water
• D. All of the above

Answer 1

The correct option is D All of the above

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 the bubble increases because boiling (reading temperature) increase in the saturated vapor pressure of water and decrease in surface tension of water.

And also increasing temperature increases the root mean square velocity of air molecules inside the bubble.