Octane number of 2,2,4-trimethylpentane is?
Correct answer: A. 100
- A. 100
- B. 95
- C. 9
- D. 89
Explanation
The octane number is a measure of a fuel's ability to resist knocking or detonation during combustion in an internal combustion engine. It is compared to a scale where n-heptane has an octane number of 0 and iso-octane (2,2,4-trimethylpentane) has an octane number of 100. Iso-octane (2,2,4-trimethylpentane) is chosen as the reference fuel because it exhibits very good anti-knocking properties. When a fuel has an octane number of 100, it means that it has the same knocking resistance as iso-octane.
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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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