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Octane number can be improved by________________?

Correct answer: D. All

  • A. Isomerization
  • B. Adding (C2H5)4 Pb
  • C. Adding (CH3)4 Pb
  • D. All

Explanation

Octane number can be increased by converting straight-chain hydrocarbons into branched isomers and by using antiknock additives such as tetraethyl lead, (C2H5)4Pb, or tetramethyl lead, (CH3)4Pb. Therefore all listed methods can improve knocking resistance; students may choose only isomerization by overlooking the historical lead additives.

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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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