Nov 2000
B because in a displacement reaction, a more reactive element displaces the less reactive one, therefore, CHLORINE is more reactive than BROMINE, and displaces it, hence BR2 is formed, which turns the solution brown!
Read up displacement reactions in ''The Periodic Table''
and for m/j 03
it is white to blue because it is 'hydrated'. it i s a copper sulphate salt, reversible reaction, when u add water it goes from white to blue. when u heat it, water is taken away, so blue to white!
