In which of the following molecules, the bond angle is the lowest -

Options

A. `NCl_(3)`
B. `AsCl_(3)`
C. `SbCl_(3)`
D. `PCl_(3)`

Answer

C

Explanation

With increase in the difference in electrongeativity between the constituent elements , the bonding electrons move towards the more electronegative elements. The electrongativity decreases along the group - 15 is `N gt P gt As gt Sb` . Thus in `SbCl_(3)` the bp - bp repulsion is minimun and here it has the lowest bond angle.