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  4. The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

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Q. The correct decreasing order of priority for the functional groups of organic compounds in the $IUPAC$ system of nomenclature is

Organic Chemistry – Some Basic Principles and Techniques

Solution:

The decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is as follows:
$- COOH >- SO _{3} H >- CONH _{2}>- CHO$
- COOH functional group has higher priority than $- SO _{3} H ,- CONH _{2}$ and $- CHO$ functional groups.