JEE Main 2008 Chemistry question

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

(1)−COOH, −SO3H, −CONH2, −CHOCorrect
(2)−SO3H, −COOH, −CONH2, −CHO
(3)−CHO, −COOH, −SO3H, −CONH2
(4)−CONH2, −CHO, −SO3H, −COOH

Answer: (1)

Solution

IUPAC seniority of principal characteristic groups: carboxylic acids > sulphonic acids > (anhydrides, esters, acid halides) > amides > nitriles > aldehydes > ketones.

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Question ID VK-039054