. Fill in the blanks

(a) The slow process of conversion of dead vegetation into coal is called__________.

(b) Coal and petroleum are formed from the dead remains of organisms and are known as __________.

(c) The black thick liquid with __________ smell is known as coaltar.

(d) During the processing of coal to get coke, coal tar and__________ are also obtained.

(e) The process of separating the various constituents of petroleum is known as __________.

(f) Excessive burning of fossil fuels is a major cause of __________.


Best Answer

Ans. (a) carbonization,

(b) fossil fuels,

(c) unpleasant,

(d) coal gas,

(e) refining,

(f) air pollution

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