What is meant by (a) displacement reaction, and (b) double displacement reaction? Explain with the help of one example each.

• Displacement reaction is a reaction in which one active element displaces a less reactive element from its salt solution

2KI + Cl2 → 2KCl + I2

• Double displacement reaction is a chemical change in which two ionic compounds are exchanged and make components

Fe2O3 + 6HCl → 2FeCl3 + 3H2O