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प्रश्न
Compare the properties of metals and non-metals with respect to
- alleability
- ductility
- electrical conductivity.
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उत्तर
| Properties | Metal | Non -metal |
| Malleability | They can be hammered into sheets without breaking. | They cannot be hammered into sheets without breaking. |
| Ductility | They can be stretched into thin wires. | They cannot be stretched. |
| Electrical conductivity | They are good conductors. | They are poor conductors. |
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संबंधित प्रश्न
List the points of differences between homogeneous and heterogeneous mixtures with examples.
What are the characteristic properties of a pure substance? Why do we need them?
Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it.
What are the mixtures like A known as ?
What are the mixtures like B known as ?
What are the mixtures like C known as ?
Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them.
Name one mixture each which is like (i) A (ii) B, and (iii) C.
Discuss the method of separating a mixture containing chalk powder, iron filings and naphthalene.
Name four substances that can be used as filters.
Tick (√) the correct alternative from the choice given for the following statement:
A set of the mixture is
Explain the term mixtures.
Give an example of mixtures of two elements
Give an example of mixtures of two compounds
Give an example for mixture and justify your answer with reason.
