3.1 Explain the terms homologous series, hydrocarbons, saturated, unsaturated, general formula and isomerism

Definitions:
Homologous series-
Is an alkane family of organic compounds.
Hydrocarbon-
Contain hydrogen and carbon only.
Saturated hydrocarbon-
Compounds with single bonds.
Unsaturated hydrocarbon-
Compounds with multiple bonds between carbon atoms
General formula-
CnH(2n+2)
Isomerism-
Are compounds with different display formula and same molecular formula.