The reaction given below is an example of:
Ba(OH)2(s)+2CuCNS(s)→Ba(CNS)2(aq)+2CuOH(s)
Double displacement Reaction
The above reaction is a double displacement reaction. In double displacement reaction the two compounds react with each other, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds.