Which of the following molecules contain polar covalent bonds but is a nonpolar molecule?

Summary Submit

Polar bonds exist when bonds form between different atoms. All of the molecules except for \(\ce{N2}\) contain polar bonds.

\(\ce{CCl4}\) is a tetrahedral molecule. Since all four bonds are the same, symmetry exists and the molecule is nonpolar.

\(\ce{NH3}\) is polar since the lone pair electrons result in a trigonal pyramidal structure instead of a symmetrical tetrahedral.

\(\ce{CH2Cl2}\) is polar because the two chlorine and carbon bonds form a region of higher electron density than the bonds between hydrogen and carbon. There will be a net dipole moment due to this.