Displacement reaction by an iron nail in a copper sulphate solution.
Double Displacement Reaction example
A. Silver nitrate reaction sodium chloride
AgNO3(aq) + NaCl(aq) ——> AgCl(s) + NaNO3(aq)
Copper sulphate crystal is blue in colour. So it is also called “Blue Vitriol” (Hindi: नीला थोथा). It is used in refining industries and agriculture. When it is dissolved in water it forms blue solution.
Iron metal reacts with copper sulphate and displaces copper.
A. Hydrogen + Chlorine ——> Hydrogen chloride
B. Barium chloride + Aluminium sulphate —–> Barium sulphate + Aluminium chloride
C. Sodium + water ——> Sodium hydroxide + Hydrogen