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प्रश्न
What are the three states of matter ? Define each of them with two examples.
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उत्तर
The three states of matter are solids, liquids and gases :
- Solids - A solid has a definite shape and definite volume.
Example – wood, stone, iron, ice etc. - Liquid - A liquid has a definite volume but not definite shape.
Example - water, juice, milk, oil, etc. - Gases - A gas neither has definite shape nor a definite volume.
Example - air, hydrogen, oxygen, watervapour etc.
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संबंधित प्रश्न
What happens to water if it is kept in a deep freezer.
Define of Brownian motion.
Give one difference between atoms and molecules.
What happens when a solid is heated ?
Give reason for the following.
Liquids can flow easily.
Write true or false for statement. Rewrite the false statement correctly.
The smallest part of an element capable of independent existence 4s called an atom.
Write true or false for statement. Rewrite the false statement correctly.
The intermolecular space in a gas is almost negligible.
With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of A solid into a liquid With special reference to inter-particle space & interparticle attraction at the different stages of conversion.
With reference to inter-conversion of matter – on the basis of kinetic theory – explain in brief the conversion of Vapour [or gas] into a liquid With special reference to inter-particle space & interparticle attraction at the different stages of conversion.
Give reason for the following
Particles of matter possess energy called kinetic energy.
