which of the following hydrocarbon is saturated hydrocarbon
1) C2H6 (2) C2H4 (3) C2H2

Dear student,
CnH2n+2 is the general formula for saturated hydrocarbons or alkanes,
Hydrocarbons are compounds of carbon and hydrogen and is a subset of saturated carbon compounds.
So option 1 that is C2H6 is saturated hydrocarbon. 
Regards

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C2H6 is saturated hydrocarbon because it do not contain any double or triple bond and gives out a clean flame while burning
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