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Alkenes are unsaturated acyclic hydrocar...

Alkenes are unsaturated acyclic hydrocarbons whose molecules contain ……. Carbon-carbon double bonds (s).

A

just one

B

more than one

C

one or more

D

two or more

Text Solution

Verified by Experts

The correct Answer is:
A
Alkenes contain the functional group
They have the general formula `C_(n)H_(2n)` beacuse they have two fewer hydrogens than alkanes.
Alkenes are examples of unsaturated hydrocarbons beacuse they react to add two hydrogens at the `C=C` to form alkanes. On the other hand, alkanes are saturated hydrocarbons because they cannot react to add more hudrogens. In general, unsaturated compounds add some number of hudrogen.
Unsaturation of alkenes can be satisfied by reagents other than hydrogen, and this gives rise to the characteristic chemical reactions of alkenes.
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Knowledge Check

  • Alkynes are unsaturated acyclic hydrocarbons containing

    A
    (1) two `pi` bonds
    B
    (2) two double bonds
    C
    (3) triple bonds
    D
    (4) just one triple bond

  • Unsaturated hydrocarbon contains

    A
    single and double bonds
    B
    only double bonds
    C
    only triple bonds
    D
    double and triple bonds

  • Unsaturated hydrocarbon contains

    A
    single and double bonds
    B
    only double bonds
    C
    only triple bonds
    D
    double and triple bonds