which of these molecules has polar bonds and is nonpolar?

Question

Cl2
SO2
HCCH
CS2
CCl4

Answer 1

Cl2: non-polar bond;
SO2: polar bonds and polar molecule.
HCCH: people do not think CH bonds polar, but in reality as long as two atoms are different, the bond would be a little polar. HCCH is a linear molecule, and thus is non-polar at all. Note: to say HCCH "molecule has polar bonds and is nonpolar" is not the best answer.
CS2: Molecule has polar bonds and is nonpolar
CCl4: Molecule has polar bonds and is nonpolar

Answer 2

Yes, you can have a polar molecule that contains non polar bonds. For example, alcohols can be polar due to the -OH group, but contain non-polar C-C bonds. However, you cannot have a polar molecule with only non-polar bonds since the polarity of a molecule is determined by the individual bonds. You can have a non-polar molecule with polar bonds if they cancel out due to the shape, but not the other way around.