Question

Cracking is a process in which :

• A. Petrol is produced by cracks on the surface of wax.
• B. Combustion of petrol is carried out.
• C. Compounds of high molecular mass are converted into compounds of lower molecular mass
• D. None of the statements is correct

Answer 1

The correct option is C Compounds of high molecular mass are converted into compounds of lower molecular mass

• Cracking, in petroleum refining, the process by which heavy hydrocarbon molecules are broken up into lighter molecules by means of heat and usually pressure and sometimes catalysts. Cracking is the most important process for the commercial production of gasoline and diesel fuel.
• Cracking of petroleum yields light oils (corresponding to gasoline), middle-range oils used in diesel fuel, residual heavy oils, a solid carbonaceous product known as coke, and such gases as methane, ethane, ethylene, propane, propylene, and butylene.
  

Option C is correct.