. Which of the following bonds will be most polar
(a) N - Cl
(b) O - F
(c) N - F
(d) N - N
Correct Option is: C
The difference in E.N determines polarity of a molecule. Polarity of the bond depends upon the electronegativity difference of the two atoms forming the bond. Greater the electronegativity difference, more is the polarity of the bond. Hence, C is the correct option.
N - Cl = 3.04 - 3.16, O - F = 3.5 - 4.0, N - F = 3.04 - 4.0 N - N = 3.04 - 3.04