Question

when an iron knife is dipped in a copper sulphate a reddish brown layer is formed. explain

Answer 1

when an iron knife Fe is react with CuSO4 then the product form is Cu and FeSO4 the reddish brown layer is of Cu this is an displacement reaction.
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Answer 2

a reddish brown colour of iron sulphate(Fe2(SO4)3) is formed in which Fe3+ ion imparts the reddish brown colour please mark it as brainlist answer