Question

When chlorine gas is passed through potassium bromide solution, potassium chloride and bromine are formed. Which is a more reactive non-metal: bromine or chlorine? Give reasons for your answer.

Answer 1

In the solution of K-Br (Potassium Bromide) we-pass chlorine gas$\left({Cl}_2\right)$, then chlorine will displace Bromine-from K-Br and form potassium chloride (KCl) and librate Bromine, which orange color to the solution.

${Cl}_2\left(aq\right)+2KBr\left(aq\right)⟶2KCl\left(aq\right)+{Br}_2\left(aq\right)$

So,

Chlorine is more reactive than bromine the relative order is:- Chlorine > Bromine

The chlorine is more reactive than the bromine because the electronegativity of chlorine is more than that of bromine.