Question

In compounds of type $EC1_3$, where E = B , P, As or Bi, the angles Cl-E - Cl for different E are in the order

• A. B > P = As = Bi
• B. B > P > As > Bi
• C. B < P = As = Bi
• D. B < P < As < Bi

Answer 1

Answer: (B)

B > P > As > Bi

Answer 2

In BC13, bond angle = 120$^{\circ}$. In PC13, AsC13 and BiCl3, central atom is $sp^3$ hybridised. Since P, As and Bi are from the same group, bond angle decreases down the group. Hence, overall order of bond angle is : $\, \, \, \, \, \, \, \, \,$ B > P > As > Bi