1.

(1)Fill in the blanks.​​(a) The slow process of conversion of dead vegetation into coal is called__________.(2)Fill in the blanks.​​(b) Coal and petroleum are formed from the dead remains of organisms and are known as __________.(3)Fill in the blanks.​​(c) The black thick liquid with __________ smell is known as coal tar.(4)Fill in the blanks.​​(d) During the processing of coal to get coke, coal tar and __________ are also obtained.(5)Fill in the blanks.​​(e) The process of separating the various constituents of petroleum is known as __________.(6)Fill in the blanks.​​(f) Excessive burning of fossil fuels is a major cause of __________.

Answer» (1)

Fill in the blanks.​



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


(2)

Fill in the blanks.​

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


(3)

Fill in the blanks.​

​(c) The black thick liquid with __________ smell is known as coal tar.


(4)

Fill in the blanks.​

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


(5)

Fill in the blanks.​

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


(6)

Fill in the blanks.​

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





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