A) iodide is a bulky ion
B) \[\text{C}{{\text{u}}^{\text{2+}}}\]oxidizes iodide to iodine
C) \[\text{C}{{\text{u}}^{\text{2+}}}\] (aq) has much more negative hydration enthalpy
D) \[\text{C}{{\text{u}}^{\text{2+}}}\]ion has smaller size
Correct Answer: B
Solution :
All\[\text{Cu}\,\text{(II)}\]halides are known except the iodide because \[\text{C}{{\text{u}}^{\text{2+}}}\]oxidizes iodide to iodine. \[2CuS{{O}_{4}}+4KI\xrightarrow{{}}2cI\downarrow +{{I}_{2}}\] \[{{\text{I}}_{\text{2}}}\]is produced by oxidation of\[{{\text{I}}^{-}}\]which reduces \[\text{C}{{\text{u}}^{\text{2+}}}\]to\[\text{CuI}\text{.}\]
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