Q18Multiple choice
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 coal tar.
- (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 __________.
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(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 coal tar.
(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 __________.