Any of a class of chemical compounds containing only hydrogen and carbon (for example, the alkanes and alkenes). Hydrocarbons are obtained industrially principally from petroleum and coal tar.
Unsaturated hydrocarbons contain at least one double or triple carboncarbon bond, whereas saturated hydrocarbons contain only single bonds.
Ghana was the first country to adopt the pan-African colours. The star is known as the ‘lode star of African freedom’. Effective date: 28 February 1966.