Which molecule(s) contain(s) polar covalent bonds,but is(are) nonpolar?

Question

Quizplus · Accepted Answer

Molecule I (CO2) contains polar covalent bonds, but is nonpolar because the dipole moments of the polar bonds cancel each other out in the linear molecule. Molecule III (CCl4) also contains polar covalent bonds, but is nonpolar because the molecule is tetrahedral and the bond polarity is evenly distributed around the central carbon atom. Molecule II (H2O) and IV (NH3) both contain polar covalent bonds and are polar molecules due to their molecular geometry. Therefore, choices B and C can be eliminated, leaving D as the correct answer.

Which Molecule(s) Contain(s) Polar Covalent Bonds,but Is(are) Nonpolar