Petroleum is a mixture of_______.

The correct answer is option 1 i.e Hydrocarbon.

• Petroleum is a mixture of different hydrocarbons.
• Hydrocarbon is an organic chemical compound that contains hydrogen and carbon atoms. 
• The hydrocarbons present in petroleum products are mostly alkanes, naphthenes, and various aromatic hydrocarbons.
• Petroleum is a naturally occurring liquid found beneath the Earth's surface.
• Petroleum can be recovered by the process of oil drilling.
• Petroleum products include transportation fuels, road oil, synthesis of plastics, fertilisers, adhesives, and pesticides.
• Each petroleum product has its own unique mixture of molecules, which define its properties, like color and viscosity.
• When petroleum products are burned for energy it releases carbon dioxide gas.