Question

Is it possible for a molecule to be nonpolar even though it contains polar covalent bonds?

Answer 1

Absolutely...............

Explanation:

Molecular polarity is conceived to result from the VECTOR sum of the individual bond dipoles. For a molecule such as `CX_4` `("X = halide")`, the individual bond dipoles are polar, due to the difference in electronegativity between carbon and halogen. However, because the vector sum of the `CrarrX` dipoles is ZERO, the molecule is non-polar.

And thus chloroform, `"CHCl"_3` is polar, while `"CCl"_4` is non-polar.