The compounds of type ECl3 where E=B,P,AS(or) Bi the angles Cl-E-Cl for different E are in the order.

1) In BCl3 Boron undergoes sp2 Hybridization 120∘ 2) In PCl3,AsCl3&BiCl3 the central atom undergoes sp3 and one lone pair. Hence the bond angles< 109°281