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 ___.

Question 18 (a) The slow process of conversion of dead vegetation into

1.	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» 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 ___.