A hydrocarbon has the general formula CnH2n. Which of the following could be this hydrocarbon?
Correct: A
The general formula CnH2n can represent either an alkene (with one double bond) or a cycloalkane (a cyclic saturated hydrocarbon). A) Cyclohexane is C6H12, which fits the CnH2n formula (n=6). B) Benzene is C6H6, which does not fit CnH2n. C) Ethane is C2H6, which is CnH2n+2 (an alkane). D) Propyne is C3H4, which is CnH2n-2 (an alkyne). Therefore, Cyclohexane is the correct option.