Question

Excess of ki reacts with cuso4 solution and then na2s2o3 solution is added to it. which of the statements is incorrect for this reaction?

Answer 1

This your question is incomplete but first let's go through it again and then see whether I can give you the answer.

It is given that excess of Potassium Iodide, KI reacts with copper (II) sulfate solution and then sodium thiosulphate solution is added to it.  

Then the statement that is likely to be correct is that CuI₂ is formed.