Alkenes
Alkenes
Unsaturated Hydrocarbons:
Those carbon compounds in which atleast one double or triple bond (or multiple bond) is present along with single bonds are called unsaturated compounds. These compounds generally burn with sooty or smoky flame due to their incomplete combustion. These are more reactive than saturated hydrocarbons and generally undergo addition reactions. Unsaturated compounds are further divided into following two classes: Alkenes and Alkynes
Alkenes or Olefins:
Those carbon compounds which have atleast 1 double bond along with single bonds are called alkenes. (A double bond is formed by the sharing of 2 pairs of electrons between the 2 carbon atoms). General formula of these compounds is . E.g. if an alkene have 2 carbon atoms, i.e. n =2 , than
=
(ethene).
| Name | Molecular Formula | Condensed Formula | Structural Formula |
| Ethylene |  |
 |
Unsaturated Hydrocarbon compounds in which atleast one ________________________ is present along with single bonds are called unsaturated compounds. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Unsaturated Hydrocarbon compounds which have atleast 1 double bond along with single bonds are called alkenes. (b) Unsaturated Hydrocarbon compounds generally burn with sooty or smoky flame due to their incomplete combustion. (c) Unsaturated Hydrocarbon compounds in which atleast one double or triple bond (or multiple bond) is present along with single bonds are called unsaturated compounds. | |||
| Right Option : D | |||
| View Explanation | |||
In which of the following compounds is the number of carbon atoms half the number of hydrogen atoms ? | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
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