Q54 of 65 Page 89

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

Many useful substances are obtained from petroleum and natural gas. These are termed as ‘Petrochemicals’. Due to its great commercial importance, petroleum is also called ‘black gold’.

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52

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

 53

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

 55

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

 56

Which of the following is not obtained as a fractional during the refining of petroleum?