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MHT CET202615 April 2026Evening ShiftChemistryGeneral Organic ChemistryActual

What is the correct IUPAC name for a molecule that has two amino groups in opposing (para) locations around a benzene ring?

Options

  1. ABenzenediamine
  2. BBenzene-1,4-diamine
  3. Cp-Aminoaniline
  4. D4-Aminobenzenamine

Correct answer

B. Benzene-1,4-diamine

Step-by-step solution

The molecule consists of a benzene ring with two amino ( -NH₂ ) groups attached at opposite positions. According to IUPAC nomenclature rules, the parent hydrocarbon is benzene. The two amino groups are indicated by the suffix "diamine". The positions of the amino groups are numbered to give them the lowest possible locants. Since they are at opposite positions (para), the locants are 1 and 4 . Combining these parts, the correct IUPAC name is benzene-1,4-diamine. Answer: Benzene-1,4-diamine

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