Q22 of 36 Page 26

Write two important uses of coke.

Two important uses of coke are it is used as a reducing agent in the extraction of metals like iron, zinc etc. It is used in the manufacture of steel.


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20

Sunlight and air are inexhaustible natural resources. Comment.

 21

Some natural resources are given in a box. Classify them into the exhaustible and inexhaustible natural resources.

air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen.

 23

Write the characteristics and some important uses of coal.

 24

Look at Fig. 5.1 where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer?