Question

Below are given two chemical reactions:

1. 2KBr (aq) + CI₂ (aq) → 2KCI (aq) +Br₂ (aq)

2. Fe (s) + S (s) → FeS (s)

Which is combination reaction and which is displacement reaction?

Answer 1

1. In the first reaction, potassium bromide solution reacts with the chlorine solution to form potassium chloride solution and bromine. So, in this reaction, chlorine is displacing bromine from potassium bromide to form potassium chloride and bromine is set free, thus, it is a displacement reaction.
2. In the second reaction, iron combines with sulphur to form iron sulphide. So, it is a combination reaction.