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Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it.

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Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statements is incorrect for this reaction?
(a) Cu2I2 is formed
(b) CuI2 is formed
(c) Na2S2O3 is oxidised
(d) Evolved I2 is reduced.

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