Question

Which of the following compounds the shortest carbon-carbon bond length?

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

Answer 1

Answer: (C)

The bond length decreases in the order $s{p}^3>s{p}^2>sp$ .
Because of the triple bond, the carbon-carbon bond distance in ethyne is shortest.