Which of the following has anti-knocking properties?
Correct answer: B. Tetraethyl lead
- A. Tetramethyl lead
- B. Tetraethyl lead
- C. Iso-octane
- D. All of these
Explanation
Option A is incorrect as tetramethyl lead doesn't have anti-knocking properties. Option: B Tetra ethyl lead is an efficient antiknock agent but has one serious disadvantage, its combustion product , lead oxide, is reduced to metallic lead which is discharged into the air through the exhaust pipe and caused air pollution. Option C : Iso-octane is a branched hydrocarbon with the chemical formula C8H18. It is used as a reference fuel for gasoline because it has a high octane rating of 100.
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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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