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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.
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.
Name one pair of substances whose mixture can be separated completely by distillation.
Milk is an example of a type of matter called ______.
Give reason:
Why do petrol and water form a heterogeneous mixture?
Give two examples of the following type of mixture.
solid-liquid
Tick (√) the correct alternative from the choice given for the following statement:
A heterogeneous mixture is
State whether the following statement is true or false. If false write – the correct statement.
Components in a mixture are present in a definite proportion.
Give reasons for the following:
Naphthalene and camphor cannot be separated by sublimation.
Expand LPG ______.
