Which formula represents a nonpolar molecule containing polar covalent bonds?

(1) H2O (3) NH3

(2) CCl4 (4) H2

H2O and NH3 are polar molecules. H2 is a nonpolar molecule but the H-H bond is also nonpolar.

Therefore, the best choice is CCl4. Although the C-Cl bond is polar due to electronegativity differences, the molecule itself is nonpolar because the net dipole moments cancel out, given its tetrahedral molecular structure.

CCI4 represents a nonpolar molecular containing polar covalent bonds.