IUPAC Quiz 1

The IUPAC name of the compound

• 5-formylhex-2-en-3-one

• 5-methyl-4-oxohex-2-en-5-al

• 3-keto-2-methylhex-5-ena

• 3-keto-2-methylhex-4-enal

Answer explanation

The structure of isobutyl group in an organic compound is

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Answer explanation

Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is

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Which nomenclature is not according to IUPAC system?

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The correct IUPAC name for the compound

• 4-ethyl-3-propylhex-1-ene

• 3-ethyl-4-ethenylheptane

• 3-ethyl-4-propylhex-5-ene

• 3-(1-ethylpropyl)hex-1-ene.

Answer explanation

The IUPAC name of the compound is

• pent-4-yn-2-ene

• pent-3-en-1-yne

• pent-2-en-4-yne

• pent-1-yn-3-ene

Answer explanation

The IUPAC name of

• 1-chloro-1-oxo-2,3-dimethylpentane

• 2-ethyl-3-methylbutanoyl chloride

• 2,3-dimethylpentanoyl chloride

• 3,4-dimethylpentanoyl chloride.

Answer explanation

Names of some compounds are given. Which one is not in IUPAC system?

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Name of the compound given below is

• 4-ethyl-3-methyloctane

• 3-methyl-4-ethyloctane

• 2,3-diethylheptane

• 5-ethyl-6-methyloctane

Answer explanation

IUPAC name of the following is

• 1,5-hexenyne

• 1-hexene-5-yne

• 1-hexyne-5-ene

• 1,5-hexynene.

Answer explanation