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प्रश्न
Name the process by which common salt is obtained from sea-water.
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उत्तर
Common salt is obtained from seawater by the process of evaporation.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Name the terms for the change of vapour into a liquid.
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What is meant by saying that metals are lustrous ?
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
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There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
Choose the correct answer.
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Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
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Define the term matter.
