Question

Inference Conclusion :
1. On immersing the brown coloured iron nails in blue coloured copper sulphate solution, they
displace.wprer caten the copper sulphate solution and their colour becomes ugntgreen
2. This is a displacement reaction.
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Answer 1

Answer:

Copper changes colour when it reacts to Iron causing Iron sulphate and releasing copper

This is a displation reaction as the following has reactants displacing one other