Chem question.?

Question

Which of the following molecules are non-polar because all bonds were non-polar?

H2, O2, N2, Cl2, H2O, Ch4, NH3, HF, CO2, H2S, H2O2, C2H2, CH3F, CH3OH, CCl4, OF2, HCN


all the numbers there are suppose to be smaller and in the bottom right side of the letter. Subscript

Answer 1

The molecules which are non-polar BECAUSE their bonds are non-polar are:

H2, O2, N2, Cl2, CH4, C2H2

Some of the others are non-polar, even though they have polar bonds, because of their geometry:
CO2, CCl4

All of the others are polar molecules.