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JEE Main levelSingle correct optionDifficulty 2 of 3nm037

What is the IUPAC name of ?

  1. A3-ethyl-5,5-dimethylhexane
  2. B4,4-dimethyl-2-ethylhexane
  3. C2,2-dimethyl-4-ethylhexane
  4. D4-ethyl-2,2-dimethylhexane

Answer: D

The longest chain has six carbons (hexane). Numbering from the end with the quaternary carbon gives locants {2,2,4}, lower than {3,5,5}. Prefixes are alphabetized by their first letter, ignoring the multiplying prefix di-: ethyl comes before methyl. The name is 4-ethyl-2,2-dimethylhexane.
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