Question

A has the shortest bond length.

• A. single bond
• B. double bond
• C. triple bond

Answer 1

The correct option is C triple bond

$\bullet$ Bond length or bond distance is the equilibrium distance between nuclei of two atoms which form a covalent bond. It is inversely proportional to bond order.
$\bullet$ Thus, the bond lengths follow the order:
Triple bond < double bond < single bond
Thus, a triple bond is shortest in length.