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प्रश्न
Give a reason why:
Gases have no definite volume and no definite shape.
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उत्तर
Any matter that is a gas has no definite volume and no definite shape. The molecules in a gas are least closely packed and intermolecular space between them is very large when compared to solids and liquids. The intermolecular force of attraction between the particles are negligible. As a result, a liquid does not easily change its shape nor they have fixed volume.
संबंधित प्रश्न
Define interconversion of states of matter.
Give reason:
Why do liquids and gases flow but solids do not ?
Write whether the following statement is true or false.
Only water can exist in three different states.
Write true or false for each statement. Rewrite the false statement correctly.
If the intermolecular space is more than the intermolecular force will be weaker.
Which one of the following statements is not true?
- the molecules in a solid vibrate about a fixed position
- the molecules in a liquid are arranged in a regular pattern
- the molecules in a gas exert negligibly small forces on each other, except during collisions
- the molecules of a gas occupy all the space available
Give reasons for the following:
Solids have a definite shape and are highly rigid while gases have to definite shape and are least rigid.
Give reasons for the following:
Water on freezing turns into ice.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to volume.
A crystal of iodine is placed in a closed flat bottom flask and heated. State how you would conclude from the observations seen, that interparticle space is minimum in solids and maximum in gases.
In a glass containing some water, tamarind juice and sugar are added and stirred well. Is this a mixture? Can you tell why? Will this solution be sweet or sour or both sweet and sour?
