Textbook Problem

On the basis of the electronegativity values given in Fig. 12.3, indicate which is the mare polar bend in each of the following pairs.

msp;  $\begin{array}{l}\text{a}.\text{ N}—\text{P }0\text{r N}—\text{O }\text{c}.\text{ N}—\text{S or N}—\text{C}\\ \text{b}.\text{ N}—\text{C }0\text{r N}—\text{O} \text{d}.\text{ N}—\text{F or N}—\text{S}\end{array}$