Answers

2016-04-27T20:09:11+05:30
Unsaturated hydrocarbon means alkanes or alkynes

this are not completely saturated
they undergo addition reaction with any catalyst
whereas ALKANES are Saturated Hydrocarbons
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2016-04-27T20:16:48+05:30
Unsaturated Hydrocarbons : The molecules of these Hydrocarbons contain one or more carbon - carbon multiple bonds.Based on these , they can be further classified as 

(a) Alkenes : These are the unsaturated hydrocarbons that contain a carbon - carbon double bond in their molecules. General formula of Alkenes is CnH2n.

(b) Alkynes : These are unsaturated hydrocarbons which contain a carbon - carbon triple bond in their molecules.General formula of alkynes is CnH2n-2.
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