Q55 of 65 Page 89

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

Coal tar is a mixture of about 200 substances. It is a black, thick liquid with unpleasant smell. Synthetic dyes, drugs, perfumes, plastics and paints. Naphthalene balls used to repel moths and other insects are also obtained from coal tar.

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

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

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

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Which one of the following is an inexhaustible natural resource?