MDCAT Chemistry MCQ #1784

An analytical chemist measures carbon-carbon distances in various rings. Which molecule shows uniform bond lengths that are intermediate between single and double bonds?

MDCAT Chemistry MCQ #1784

  1. Question 1

    Q1. An analytical chemist measures carbon-carbon distances in various rings. Which molecule shows uniform bond lengths that are intermediate between single and double bonds?

    • A) Ethane
    • B) Ethene
    • C) Benzene
    • D) Ethyne

    Answer: Benzene

    Explanation: Benzene has intermediate C-C bond lengths (1.397 A) due to resonance; Ethane is tempting but has a much longer single bond.