Coal:-
…………is a brown black solid mass and a major source of organic compound.
a) coal
b) petroleum
c) natural gas
d) protein
It is believed that coal is formed from the remains of…………
a) plants
b) rock
c) plastic
d) iron
In millions of years, under the bacterial and chemical action on the remains of tree and plants is converted into…………
a) peat
b) wood
c) sui gas
d) rock
…………is obtained by the process of destructive distillation.
a) coal
b)natural gas
c) wood
d) plants
When coal is strongly heated in the absence of air, this process is called…………
a) carbonization
b) fractional distillation
c) destructive distillation
d) both a & c
