Write the characteristics of hydrocarbons .

Explanation

`*` Lower hydrocarbons are gases at room temperature E.g. Methane, ethane.
`*` They are colourless and odourless.
`*` The boiling point of hydrocarbons increases with an increase in the number of carbon atoms.
`*` They undergo combustion reaction with oxygen to form `CO_(2)` and water.
`*` Alkanes are least reactive when compared to other classes of hydrocarbons.
`*` Alkynes are the most reactive due to the presence of the triple bond.
`*` Alkanes are saturated whereas alkenes and alkynes are unsaturated.
`*` They are insoluble in water.