Naming and Properties of Alkanes
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Questions and Answers

What is the correct name for the molecule $H_3C-CH_2-CH(CH_3)-CH_2-CH_3$?

  • 3,3-dimethylpentane
  • 3-ethyl-2-methylpentane (correct)
  • 3-methylpentane
  • 2-methylhexane
  • Which of the following structures corresponds to the name 3-ethyl-1,5,5-trimethylcyclohexene?

  • A cyclohexane with two ethyl groups
  • A cyclic structure with one ethyl and three methyl substitutions (correct)
  • A linear structure with no cyclic formations
  • A structure with no substituents
  • Which molecule is represented by the structure $H_3C-CH(CH_3)-CH_2-CH(CH_3)-CH_2-CH_3$?

  • 3,4-dimethylhexane
  • 2,3-dimethylhexane
  • 3-ethyl-2,3-dimethylpentane (correct)
  • 1-ethyl-2-methylpentane
  • Which of the following statements is true regarding alkanes?

    <p>Alkanes are saturated hydrocarbons with single bonds only.</p> Signup and view all the answers

    Considering physical properties, which of the following alkanes is expected to have the highest boiling point?

    <p>Hexane</p> Signup and view all the answers

    Study Notes

    Naming Alkanes

    • A is 3-methylhexane
    • B is 2,4-dimethylhexane

    Drawing Alkanes

    • 3-ethyl-2-methylpentane has a 5 carbon chain with an ethyl group at position 3 and a methyl group at position 2
    • 3-ethyl-1,5,5-trimethylcyclohexene has a six-carbon ring with a double bond between carbons 1 and 2, an ethyl group at position 3 and methyl groups at positions 1, 5, and 5

    Physical Properties of Alkanes

    • Alkanes are nonpolar
    • Alkanes have weak intermolecular forces
    • The boiling point of alkanes increases with increasing chain length
    • Alkanes are less dense than water
    • Alkanes are generally unreactive, but they can undergo combustion

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    Description

    This quiz covers the naming conventions and physical properties of alkanes. Explore the details of various alkane structures and their characteristics, including nonpolarity and combustion. Test your understanding of organic chemistry fundamentals related to alkane compounds.

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