MDCAT Chemistry MCQ #3966

X-ray diffraction of benzene reveals that all carbon-carbon bond lengths are exactly 1.397 Angstroms. This unique measurement is an anomaly because:

MDCAT Chemistry MCQ #3966

  1. Question 1

    Q1. X-ray diffraction of benzene reveals that all carbon-carbon bond lengths are exactly 1.397 Angstroms. This unique measurement is an anomaly because:

    • A) Bonds are intermediate between single and double
    • B) Bonds are purely single bonds
    • C) Bonds are purely double bonds
    • D) Bonds are purely triple bonds

    Answer: Bonds are intermediate between single and double

    Explanation: Benzene C-C bonds are 1.397A, intermediate between single and double. 1.34A is tempting but it represents a pure double bond.