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Which of the following is incorrect rega...

Which of the following is incorrect regarding the alkanes?

A

(1) All the bonds in the molecules of alkanes are sigma bonds.

B

(2) The hybridization of every `C` atoms in alkanes is `sp^(3)`.

C

(3) The bond angles at the `C` atoms of all alkanes are tetrahedral, i.e., `109.5^(@)`.

D

(4) The rotation of group joined by a single bond usually requires a large amount of energy.

Text Solution

Verified by Experts

The correct Answer is:
D
A sigma bond (i.e., any non-multiple bond) has cylindrical symmetry along the bond with respect to the bonded atoms. Therefore, rotation is practically unhindered.
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Knowledge Check

  • Which of the following is incorrect regarding O_3

    A
    It is an allotrope of oxygen.
    B
    `d_(o-o)` is in between that of `O_2` and `H_2O_2`
    C
    It is an angular-shaped molecule.
    D
    It is paramagnetic like `O_2`

  • Which of the following is incorrect regarding O_3

    A
    It is an allotrope of oxygen.
    B
    `d_(o-o)` is in between that of `O_2` and `H_2O_2`
    C
    It is an angular-shaped molecule.
    D
    It is paramagnetic like `O_2`

  • Which of the following is incorrect regarding O_3

    A
    It is an allotrope of oxygen.
    B
    `d_(o-o)` is in between that of `O_2` and `H_2O_2`
    C
    It is an angular-shaped molecule.
    D
    It is paramagnetic like `O_2`