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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3nm079

Select the correct statements about alphabetical order of prefixes.

  1. AThe prefix dimethyl is alphabetized under d.
  2. BIn 3-ethyl-2,2-dimethylpentane the prefix ethyl is cited before dimethyl.
  3. CThe prefix isopropyl is alphabetized under i.
  4. DThe prefix tert-butyl is alphabetized under t.

Answer: B, C

Multiplying prefixes such as di and tri are ignored, so dimethyl goes under m and ethyl (e) precedes it (first true). Iso is part of the name, so isopropyl is under i (second true). The italic prefixes sec and tert are ignored, so tert-butyl goes under b (false). Dimethyl is under m, not d (false).
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