Question

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. The reason for this is

• A. Linear expansion of air
• B. Surface expansion of air
• C. Volume expansion of air
• D. None of the above

Answer 1

The correct option is C

Volume expansion of air

When the bottle is heated, bubbles of air are seen escaping into the water because on heating increase in volume and try to escape through the passage of the tube and escape through the water making it bubbling.

i.e Volume expansion of air is the reason for this.