Are all displacement reactions Exothermic and Redox? Justify

Displacement reactions and redox reactions are different. A displacement reaction is one in which an element replaces another element from its compound. Displacement reactions are further of two types 
1) Single displacement reactions
2) Double displacement reaction
Redox reactions, on the other hand are the reactions involving oxidation and reduction, as these two processes always take place simultaneously. 
Between barium chloride and copper sulphate in which heat is absorbed and white precipitate of barium sulphate is formed. So it is endothermic reaction.

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