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ChemistrySingle correct+4 / -1Question 65 of 75

JEE Main 2026 · 2 Apr · Shift 1, Chemistry question 65

In IUPAC nomenclature, the correct order of decreasing priority of functional group is :

Choose one option
Answer and worked solution

Official answer: C

IUPAC seniority. Acids > anhydrides > esters > acid halides > amides > nitriles > aldehydes > ketones > alcohols > amines > alkenes/alkynes.

  • (A) puts the ketone before the aldehyde.
  • (B) puts the ester after the amide.
  • (D) puts the nitrile after the aldehyde.
  • (C) −CONHX2\ce{-CONH2} > −CHO\ce{-CHO} > >C=O\ce{>C=O} > −NHX2\ce{-NH2} > −C≡C−\ce{-C#C-} ✓

(C)