Which of the following best distinguishes a bond from a bond?

CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

Which of the following best distinguishes a

\sigma

bond from a

\pi

bond? (a) A

\sigma

bond prevents rotation about the bond axis, whereas a

\pi

bond allows free rotation. (b) A

\sigma

bond results from side-by-side overlap above and below the internuclear axis, whereas a

\pi

bond results from end-to-end overlap along that axis. (c) A

\sigma

bond results from end-to-end overlap of orbitals along the internuclear axis, whereas a

\pi

bond results from side-by-side overlap above and below that axis. (d) A

\sigma

bond is weaker than a

\pi

bond because its orbital overlap is less extensive.