Ozonolysis of benzene produces___________________?
Correct answer: B. Glyoxal
- A. Glycol
- B. Glyoxal
- C. Vicinal diol
- D. Both B & C
Explanation
Ozonolysis breaks the carbon-carbon bonds of benzene and produces three molecules of glyoxal, OHC-CHO. Glyoxal is a dialdehyde, not a glycol or vicinal diol, which are compounds containing hydroxyl groups. The likely mistake is choosing vicinal diol because ozone adds across carbon-carbon multiple bonds in many simpler alkenes.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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