Question

Write five uses of nonmetals.
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

Some of the important uses of nonmetals are as follows:

1.Liquid nitrogen used for preserving foods by freezing it quickly.

2. In the vulcanisation of rubber sulphur is used for hardening the rubber in making tyres.

3. In rocket liquid hydrogen is used as a fuel.

4. In the hydrogenation of vegetable oil to make vegetable ghee  or Vanaspati ghee hydrogen is used.

5. In the manufacture of ammonia hydrogen used.

6. For Making the electrodes of electrolytic cells and dry cells carbon is used in the form of Graphite.

7. In making gunpowder sulphur is used as fungicide.

8. Nitrogen is also used to preserve food materials due to its inertness.

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Answer 2

oxygen is used for breathing
carbon is used in crackers
cholrine is used for water purification
nitrogen is used as fertilozers
non metals are also used to make antiseptics

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