Question

Which of the following bond angle is not observed in $PC{l}_5$ molecule in gaseous state?

• A. ${120}^{\circ }$
• B. ${180}^{\circ }$
• C. ${90}^{\circ }$
• D. ${60}^{\circ }$

Answer 1

The correct option is D ${60}^{\circ }$

For $PC{l}_5$,
hybridisation =$ds{p}^3$,
geometry = trigonal bipyramidal.
As can be seen from the structure, the observed bond angles between $\angle Cl\left(2\right)-P-Cl\left(3\right)={120}^{\circ },\angle Cl\left(1\right)-P-Cl\left(5\right)={90}^{\circ }\text{and}\angle Cl\left(1\right)-P-Cl\left(4\right)={180}^{\circ }$