Hydrocarbons GapFill

Molecules which contain only hydrogen and carbon atoms are called  organic compoundshydrocarbonsinorganic compoundscarbohydrons.

Alkenes are a group of molecules which contain a carbon-carbon  ionictriplesingledouble bond. The general formula of the  homologous seriescarbon sequencereactivity serieshydrocarbon collection of alkenes is C_nH_2n. Alkenes have fewer hydrogen atoms than their analogous alkanes, so are called  saturatedcondensedunsaturateduncondensed. They can also be distinguished from alkanes using the bromine water test; for example, when ethene reacts with aqueous bromine, the product formed is  C2H4Br2C3H6Br2C2Br4CH2Br2.

Both alkanes and alkenes undergo  eliminationreductionadditionoxidation reactions when they burn. If there is insufficient oxygen, this is called incomplete combustion, and it can result in the formation of soot and  graphitegraphenecarbon dioxidehydrogen, rather than just carbon dioxide and water from complete combustion.