Textbook Problem

or each of the following molecules, indicate the bond angle expected between the central atom and any two adjacent chlorine atoms.

msp;  $\begin{array}{l}\text{a}.{\text{ C1}}_{\text{2}}\text{O}\text{c}.{\text{ BeCl}}_{\text{2}}\\ \text{b}.{\text{ CCl}}_{\text{4}} \text{d}.{\text{ BCl}}_{\text{3}}\end{array}$