Advertisements
Advertisements
प्रश्न
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 the water. Explain the reason.
Advertisements
उत्तर
When the bottle is heated, bubbles of air are seen escaping into the water. This happens because the air present in the glass bottle expands on heating and tries to escape out through the tube into the water.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
_________ determines the degree of hotness or coldness of a body.
Fill in the blank
On heating a body, its temperature _______.
Fill in the blank
Liquids expand _______ than the solids.
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Describe one experiment to show that liquids expand on heating.
Describe an experiment to show that air expands on heating.
What are the good and bad conductors of heat ? Give two examples of each.
What are the effects of heat?
In ice cubes, the force of attraction between the water molecules is ______.
Match the following
| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
