Q60 / 160 · JIPMER 2012 · Chemistry

Which one of these is not true for benzene?

  • A
    It forms only one type of monosubstituted product
  • Correct answer
    B
    There are three carbon-carbon single bonds and three carbon-carbon double bonds
  • C
    Heat of hydrogenation of benzene is less than its theoretical value
  • D
    The bond angle between carbon-carbon bonds is $120^{\circ}$

Solution

The Benzene has \(120^{\circ}\) bond angle. The more heat released, the more negative the value. Benzene releases less heat (has a lower heat of hydrogenation) because of its aromatic properties which gives it remarkable stability. Benzene does not have 3 single and 3 double bonds. All bonds are partially double bonds due to resonance.

Hence, the correct answer is option: 'B'.

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