Concept:Alkanes are saturated hydrocarbons whose most important use depends on their combustion reaction with oxygen.
Explanation:Alkanes need a spark or sufficient activation energy to start burning because they are generally stable molecules.
Once ignited, they burn completely in oxygen to produce carbon dioxide and water.
This reaction is strongly exothermic and releases a large amount of heat energy.
For example, combustion of methane is:
CH4+2O2→CO2+2H2O+heatThis heat makes alkane-containing mixtures such as natural gas, liquefied petroleum gas, petrol, and kerosene excellent fuels.
Therefore, the major practical use of alkanes is as domestic and industrial fuel.
They are not chiefly used in hydrogenation of oils, textile manufacture, or plastic production.
Answer:A. as domestic and industrial fuel.