Polarity Of Bonds

The dipole moment of a molecule depends on molecular geometry and the vector sum of bond dipole moments.

Analysis:

• : Tetrahedral, symmetric, net dipole moment = 0.
• : Linear, symmetric, net dipole moment = 0.
• : Trigonal planar, symmetric, net dipole moment = 0.

Therefore, all given molecules have zero dipole moments.

The correct answer is (D) None of these.