Question

Copper sulphate solution on treatment with excess of KI gives whitish precipitate.The precipitate is-
(A)CuI2
(B)Cu2I2
(C)Cu2SO4
(D)I2

Answer 1

I think the answer is (B) - Cu2I2

Answer 2

Answer:The correct answer is option B

Explanation:

When copper sulfate solution on treatment with excess of KI gives, copper(I) iodide, iodine gas, and potassium sulfate.The reaction is shown as:

$2CuSO_4(aq)+4KI(aq)\rightarrow I_2(g)+Cu_2I_2(ppt)+2K_2SO_4(aq)$

$Cu_2I_2=CuI$ Copper(I) iodide

This reaction an example of double displacement reaction.