Question

what will happen if you copper sulphate solution using a spoon made from iron

Answer 1

if we use cuso4 using spoon made of iron then iron displaces cu bcoz fe is more reactive than cu

Answer 2

when the above reaction will take place iron will displace cuppor as iron is more reactive than copper .
Fe+CuSO4-------FeSO4+Cu 
this is also an example of displacement reaction