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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.
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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.
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संबंधित प्रश्न
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On heating a body, its temperature _______.
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In a thermometer, the commonly used liquid is _______
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Still air is an __________ of heat.
Describe one experiment to show that liquids expand on heating.
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The bottom of a cooking utensil is painted black. Give the reason.
The applied heat energy can be realized as an increase in the average kinetic energy of the molecules.
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When we heat them the force of attraction between the molecules decreases and the ice cubes become ______.
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| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
