Question

Which of the following is non-polar but contains polar bonds?

• A. $HCl$
• B. $H_{2}O$
• C. $N{H}_3$
• D. none of the above
  

Answer 1

Answer: (D)

none of the above

All the four compounds are polar and have net dipole moment. They all contain polar bonds. However $N{O}_2$ in solid state undergoes dimerization to form $N_2{O}_4$. Its planar configuration is more stable than twisted configuration. In the planar configuration, the individual bond dipoles cancel each other and the configuration becomes non polar.