76. Which gas is responsible for the formation of tight gas, a type of natural gas trapped in impermeable rocks?
a) Oxygen
b) Carbon dioxide
c) Methane
d) Nitrogen
77. What is the term used to describe the process of converting biomass into solid fuels, such as wood pellets or briquettes?
a) Biomass conversion
b) Biomass gasification
c) Biomass liquefaction
d) Biomass pyrolysis
78. Which country is the largest exporter of coal in the world?
a) Australia
b) Indonesia
c) Russia
d) United States
79. What is the process of converting natural gas liquids into a liquid state called?
a) Liquefaction
b) Vaporization
c) Gasification
d) Condensation
80. Which gas is responsible for the formation of associated gas, a type of natural gas that is found in conjunction with oil deposits?
a) Oxygen
b) Carbon dioxide
c) Methane
d) Nitrogen
