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NEET levelSingle correct optionDifficulty 1 of 3nm221

What is the IUPAC name of the compound shown? Use the NCERT-style rules: lowest locants, prefixes in alphabetical order.

  1. A2,2,4-trimethylhexane
  2. B2,4,4-trimethylpentane
  3. C2,2,3-trimethylpentane
  4. D2,2,4-trimethylpentane

Answer: D

The compound is 2,2,4-trimethylpentane. The longest chain has 5 carbons and carries three methyl groups. Numbering from the end nearer the branches gives the set 2,2,4 against 2,4,4 from the other end; the first point of difference favours 2,2,4.
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