Define double displacement reaction.

The reaction FeS + H_(2) SO_(4) to FeSO_(4) + H_(2)S is an example of double displacement reaction.

You are given the following chemical equation : Mg(s) + CuO(s) to MgO(s) + Cu(s) This equation represents : decomposition reaction as well as displacement reaction (b) combination reaction as well as double displacement reaction. (c) redox reaction as well as displacement reaction. (d) double displacement reaction as well as redox reaction.

Give an example of a double displacement reaction . Describe an activity to illustrate such a reaction .