Final answer:
The question seeks to identify examples of alkenes. Gasoline and certain types of motor oil may contain alkenes, whereas propane is an alkane and carbon dioxide is not a hydrocarbon.
The correct answer is None of all.
Step-by-step explanation:
The question asks for examples of alkenes. Alkenes are hydrocarbons that contain at least one carbon-carbon double bond in their structure. Examples of compounds or mixtures that contain alkenes include some types of gasoline and derivatives of petroleum products such as certain types of motor oil. However, neither propane (C3H8) nor carbon dioxide (CO2) are alkenes. Propane is an alkane, which is a hydrocarbon with single bonds only, and carbon dioxide isn't a hydrocarbon at all, as it doesn't contain any hydrogen.
Therefore, in the options provided, only gasoline and potentially motor oil (depending on its composition) may contain alkenes.