Ethylene and `H_2O_2` react to give

Reaction of ethylene with H_2O_2 gives

What happens when H_2O_2 reacts with Cl2?

What happens when H_2O_2 reacts with PbS.

What happens when H_2O_2 reacts with acidified KI .

Ethylene reacts with Br_(2) to give 1,2 -dibromoethane. The reaction proceeds through the formation of the intermediate