nomenclature of different functional groups

Total number of different functional groups in following compound :

In nomenclature

Nomenclature of some other functional groups | Nomenclature of polyfunctional compounds | Nomenclature of Alicyclic compounds | Nomenclature of some importanat aromatic hydrocarbons | Degree of unsaturation

What is a functional group? Give examples of four different functional groups.

Nomenclature of some other functional groups, polyfunctional compounds, Alicyclic compounds | Structural Isomerism based questions

(a) What are hydrocarbons ? Give examples. (b) Give the structural differences between saturated and unsaturated hydrocarbons with two examples each. (c ) What is functional group ? Examples of four different functional groups.

Number of different type of functional group present in following structure is

Nomenclature of Unsaturated Hydrocarbons | Nomenclature of Various Functional Groups