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प्रश्न
What happens when a solid is heated?
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उत्तर
When a solid is heated, its molecules gain energy and vibrate faster. A stage comes, when they overcome the intermolecular force of attraction and start moving from each other. This results in the melting of solid.
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संबंधित प्रश्न
What is meant by the intermolecular forces of attraction? How do they vary in solids, liquids and gases?
Write true or false for the following statement
In a gas, the molecules can move anywhere in space.
Fill in the blank
The molecular motion in liquid and gas is in ................. path.
Fill in the blank
A solid exerts pressure .....................
Give the molecular model for a solid and use it to explain why a solid has a definite volume and a definite shape.
Why liquids do not have definite shape?
Fill in the blank
The physical state of a substance, which has a fixed volume but no fixed shape is ...............
Fill in the blank
When a gas is cooled, its molecules .............. energy.
Complete the statement given below by selecting the correct word.
The conversation of vapour into a liquid is called ____.
Complete the statement given below by selecting the correct word.
____ is an example of a crystalline substance.
