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Exess of KI reacts with CuSO(4) solution...

Exess of KI reacts with `CuSO_(4)` solution and then `Na_(2)S_(2)O_(3)` solution is added to it. Which of the following statement is incorrect for this reaction ?

A

`Na_2S_2O_3` is oxidised

B

`CuI_2` is formed

C

`Cu_2 I_2` is formed

D

Evolved `I_2` is reduced

Text Solution

Verified by Experts

The correct Answer is:
B
`2overset(-1)(KI) + 2CuSO_4 to overset0I_2 + Cu_2I_2 + 2K_2SO_4`
`overset0I_2 +2Na_2 overset(+2)(S_2)O_3 to overset(+2.5)(Na_2S_4)O_6 + overset(-1)(2NaI)`.
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