Question

Consider (i) $CO_{2}$, (ii) $CCl_{4}$, (iii) $C_{6}Cl_{6}$ and (iv) $CO$ and tell which of the following statements is correct?

• A. (i), (ii) and (iii) only have zero dipole moment
• B. (i), (ii) and (iv) only have zero dipole moment
• C. only (iv) has zero dipole moment
• D. All have zero dipole moment

Answer 1

Answer: (A)

In $CO _{2}, CCl _{4}$ and $C _{6} Cl _{6}$, all polar bonds

possess the same value of dipole moment, thus overall dipole moment of molecule is found to be zero.



Whereas in case of $CO$, the dipole moment is equal to the dipole moment of $C - O$ bond.