5.Whencopperturningsareaddedtosilvernitratesolution,abluecoloured solutionisformedaftersometime.Itisbecausecopper: (i)displacessilverfromthesolution (ii)FormsabluecolouredcomplexwithAgNO3 (iii)IsoxidisedtoCu2+ (iv)IsreducedtoCu2+
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