Asked in PMC Practice Test 17 (2021) 2021Moderate

Which one of the following is the correct structure of benzene?

Correct answer: B. Hexagonal planar

  • A. Tetrahedral
  • B. Hexagonal planar
  • C. Hexagonal irregular
  • D. Trigonal planar

Explanation

A benzene ring has 6 carbons hence it is a hexagon and it is hexagonal planar and not hexagonal irregular because all the carbons are in the same plane. Hence, the answer is B.

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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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