The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight____________________?
Correct answer: B. pyrolysis
- A. polymerization
- B. pyrolysis
- C. isomerism
- D. no such process occurs
Explanation
Pyrolysis is the thermal decomposition of a large molecule into smaller molecules in the absence of oxygen; hydrocarbon cracking is a common example. Polymerization is the opposite general process, joining small monomers into a larger molecule. The likely mistake is polymerization because it also involves changes in molecular size, but it builds rather than breaks molecules.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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