The part of IUPAC name of the organic compound which denotes functional group is called ______.
The part of IUPAC name of the organic compound which denotes functional group is called Secondary suffix.
Secondary suffix indicates the functional group present in the molecule. It is added after the primary suffix. Depending on the number of occurrences of the same functional group in a compound, the words like di, tri, tetra etc., are prefixed to the secondary suffix.