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JAMB Chemistry 1988 Question 41

Question 41

Introduction to Organic Chemistry

The IUPAC name for CH3CH2CH(CH3)COOH is

  1. A.2 –methylbutanoic acid
  2. B.2 –methyl-1-hydroxyketone
  3. C.2–methyl-1-hydroxy aldehyde
  4. D.2-methylpentanoic acid.
Show the answer and explanation

Answer: A (2 –methylbutanoic acid)

Explanation

The longest chain including the COOH carbon has 4 carbons (butanoic acid), with a methyl group on carbon 2, counting the COOH carbon as 1.