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An alkane molecule is...

An alkane molecule is

A

very weakly polar

B

nonpolar

C

both (1) and (2)

D

highly polar

Text Solution

Verified by Experts

The correct Answer is:
C
`C` and `H` atoms of the alkane molecule are held together entirely by covalent bonds. These bonds either join two `C` atoms and hence, are nonpolar, or join `C` and `H` atoms that differ very little in electonegativity `(2.5 "for" C and 2.1 "for" H)` and hence, are only slightly polar. Furthermore, these bonds are directed in a very symmetrical way ( tetrahedral orientation) so that the slight bonds polarities tend to cancel out. As a result, an alkane molecule is either nonopolar or very weakly polar.
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Knowledge Check

  • During photochemical halogenation of alkanes the halogen molecules first gives

    A
    Chloride ion
    B
    Chloronium ion
    C
    Free radical
    D
    Carbonium ion

  • Which of the following CORRECTLY represents molecular formula of an alkane whose molecules weight was found to be 170 ?

    A
    `C_(10) H_(22)`
    B
    `C_(12)H_(26)`
    C
    `C_(14)H_(30)`
    D
    `C_(16 ) H_(34)`

  • Write the number of minimum carbon atoms required for chiral molecule in following compound : a chloroalkance an alcohol an alkene an alkane

    A
    5,5,5,8
    B
    5,4,5,7
    C
    4,4,6,7
    D
    4,4,4,6