The M- O -M bond angles in M ₂ O (where M is halogen) is in the order

Step-by-step solution

In OF ₂ repulsion between lone pairs is greater than that between bond pair since electrons are away from O and nearer to F . In Cl ₂ O , bonding electrons are nearer to O than to Cl , so the bond angle is greater than 109^ 28^ . In Br ₂ O , the bonding electrons are more closer to oxygen than in Cl ₂ O , so the bond angle is largest (116^ ) .