Petroleum or Crude oil is hydrocarbons. Petroleum processing is distillation-separation different fraction of hydrocarbons from each other. Petrochemical would further extract fine hydrocarbon from hydrocarbons and react them to the desire hydrocarbon chemical.
Gas samples collected at Sapper fumarole, Santiaguito, Guatemala, on December 5, 1969, were analyzed by gas chromatography-mass spectrometry. A number of compounds were found, including saturated and unsaturated hydrocarbons, aldehydes, ketones, alcohols, aromatics, halogenated hydrocarbons, and inorganic sulfur compounds. The compounds are probably produced by heating of fossil soil or sedimentary layers by the magma.
from "Organic Compounds in Volcanic Gas from Santiaguito Volcano, Guatemala", Geological Society of America Bulletin, Vol. 82, pp. 2299-2302.
so no. hydro carbons are not exclusively man made
hydrocarbons are compounds of hydrogen and carbon found in various combinations.
nothing.
tetralin
False
combustion reaction!
This depends on the chemical composition of the hydrocarbon.
After combustion water and carbon dioxide are released.
tetralin
False
Besides these Energy is produced.
alcohol
Methane, CH4, natural gas.
combustion reaction!
carbon dioxide.
very high temperatures
sulfur
No alcohol is a refined fuel, a hydrocarbon produced from sugars(carbohydrates).
This depends on the chemical composition of the hydrocarbon.
After combustion water and carbon dioxide are released.