Question

Choose the groups of molecules below in which all the molecules have a net dipole moment.
a. SiHCl3, O2, H2O
b. HF, H2ClCH2, H2O
c. HF, CH3Cl, H2O
d. CCl4, HCl, NH3
e. HF, H2O, N2

Answer 1

c. All the others contain at leat molecule that has charge symmetry about two perpendicular axes, and therefore no dipole moment

Answer 2

what is the answer?