Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
Correct answer: A. iso-alkane
- A. iso-alkane
- B. normal-alkane
- C. neo-alkane
- D. branched-alkane
Explanation
An iso-alkane has a methyl branch on the second carbon from the end, giving an isopropyl-type end arrangement such as 2-methylpropane. A student may choose branched-alkane because the structure is branched, but iso-alkane is the more specific name for a methyl group at carbon 2.
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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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