96. Which gas is responsible for the formation of conventional natural gas, which is found in porous rock reservoirs?
a) Oxygen
b) Carbon dioxide
c) Methane
d) Nitrogen
97. What is the term used to describe the process of converting biomass into a liquid fuel through heat and pressure in the absence of oxygen?
a) Biomass conversion
b) Biomass gasification
c) Biomass liquefaction
d) Biomass pyrolysis
98. Which country is the largest importer of natural gas in the world?
a) United States
b) Japan
c) China
d) Germany
99. What is the process of converting natural gas into a gaseous state through the reduction of pressure called?
a) Vaporization
b) Liquefaction
c) Gasification
d) Condensation
100. Which gas is responsible for the formation of coalbed methane, a type of natural gas found in coal deposits?
a) Oxygen
b) Carbon dioxide
c) Methane
d) Nitrogen
