If a spoon of copper metal is placed in a solution of ferrous sulfate then no reaction will take place.
Electrochemical series of metals is the series which gives idea about the reactivity of the metals if present in any solution of another metal.
Iron metal is placed at the top position with respect to the copper metal, means iron is more reactive than copper. So when a spoon of copper metal is placed in a solution of ferrous sulfate, copper will not able to displace the iron metals from its solution.
Hence no reaction will occur.
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