Chemistry bonding question

Question

Which pair of atoms has the most polar bond? a.H-H b.H-C c.H-Cl d.Cl-Cl

Answer 1

The most polar bond has the greatest difference in electronegativity between the atoms.

The homopolar diatomic molecules , H-H, Cl*Cl have no electronegativity difference so they are non-polar.

Hydrogen has electronegativity of 2.1, carbon 2.5, chlorine 3.0. So, HCl has the greatest electronegativity difference and is the most polar bond.