Concept:Tetrachloromethane (carbon tetrachloride) is the chlorinated alkane used industrially as a grease-removing solvent.
Explanation:Grease and oils are non-polar substances, so they dissolve best in non-polar solvents.
Tetrachloromethane,
CCl4, is a non-polar covalent compound with strong solvent properties.
Its molecule contains one carbon atom bonded to four chlorine atoms, giving it excellent ability to dissolve oily contaminants.
Industrially, it is used to degrease machinery and clean electrical equipment.
It also dissolves oils, fats, lacquers, varnishes, rubber, waxes, and resins, and serves as a grain fumigant.
Chloromethane, dichloromethane, and trichloromethane are not the primary industrial degreasers.
Hence, tetrachloromethane is the most suitable answer among the given options.
Answer:A. Tetrachloromethane