Q53 of 65 Page 89

Which of the following is used as a reducing agent in the extraction of iron metal?

Coke is a tough, porous and black substance. It is almost pure form of carbon. It is used as a reducing agent in the extraction of metals. It is used in the manufacture of steel and in the extraction of many metals.

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51

One of the following is not an exhaustible source of energy. This one is:

 52

The slow process by which the large land plants and trees buried deep under the earth have become coal is called:

 54

Which of the following is usually referred to as ‘black gold’?

 55

the various compounds present in coal tar are separated by the process of: