Question

Which of the following molecules has shortest C - C bond length?

Options

• C₃H₆

• C₂H₂

• C₂H₆

• C₂H₄

Answer 1

C₂H₂ 

Explanation:

Bond length decreases in the order of

\[\begin{array}{cc}
|\phantom{.....}|\phantom{.....}\backslash\phantom{......}/\phantom{............}\\
\ce{- C - C - > C = C > - C ≡ C -}\\
|\phantom{.....}|\phantom{.....}/\phantom{......}\backslash\phantom{............}\end{array}\]