Question

Question 18
(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 ___.

Answer 1

(a) The slow process of conversion of dead vegetation into coal is called carbonization.
(b) Coal and petroleum are formed from the dead remains of organisms and are known as fossil fuels.
(c) The black thick liquid with unpleasant smell is known as coal tar.
(d) During the processing of coal to get coke, coal tar and coal gas are also obtained.
(e) The process of separating the various constituents of petroleum is known as refining.
(f) Excessive burning of fossil fuels is a major cause of air pollution.