Question

Conversion of high molecular weight hydrocarbons into low molecular weight hydrocarbons in the absence of air is known as:

• A. polymerisation
• B. hydrolysis
• C. pyrolysis
• D. isomerisation

Answer 1

The correct option is C pyrolysis

Isomerisation is the process by which one molecule is transformed into another molecule, which has exactly the same atoms.
Polymerization is the process of converting a monomer or a mixture of monomers into a polymer.
Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen.
Hydrolysis is a chemical process in which a certain molecule is split into two parts by the addition of a molecule of water.