Hydrocarbons are the parent organic compounds.All other compounds are considered to have been derived from them by replacing one or more of their hydrogen atoms by some other more reactive atom or group. R—H --------> R—G -H and +G Each organic molecule consist of two parts i.e. R and G. The first part, i.e. R denotes the carbon -hydrogen framework of the … [Read more...] about Functional Or Characteristic Group