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प्रश्न
A rubber ball changes its shape on pressing. Can it be called a solid?
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उत्तर
Yes. A solid has a certain shape and size. The shape of a rubber ball changes only if we squeeze it.
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संबंधित प्रश्न
Give reasons:
A wooden table should be called a solid.
How do solids, liquids and gases differ in shape and volume?
What are molecules?
Give reasons
We can walk through air.
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles move about very quickly but do not leave the surface
Matter in any state is composed of particles. Compare the three states of matter i,e. solids, liquids, and gases with reference to:
(a) intermolecular space
(b) the intermolecular force of attraction
(c) movement of particles
Describe simple experiments to prove that gases have no definite volume or shape.
State the property of the following substance.
Sodium nitrate is soluble in water, but calcium carbonate is not.
Which of the following are the states of matter?
Match the following.
| Srl. no. | A | B | C |
| i | Separation of visible undesirable components | Water mixed with chalk powder | Magnetic Separation |
| ii | Separation of heavier and lighter components | Sand and water | Decantation |
| iii | Separation of insoluble impurities | Iron impurities | Filtration |
| iv | Separation of magnetic components from non-magnetic components | Rice and stone | Hand-picking |
| v | Separation of solids from liquids | Husk and paddy | Winnowing |
