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Cu^(+) ion is not stable in aqueous solu...

`Cu^(+)` ion is not stable in aqueous solution because because of dispropotionation reaction. `E^(@)` value of disproportionation of `Cu^(+)` is
`[E_(Cu^(2+)//Cu^(+))^(@)=+ 0.15 V, E_(Cu^(2+)//Cu)^(@)=0.34 V]`

A

second ionisation entyhalpy of copper is less than the first ionisation enthalpy

B

large value of second ionisation enthalpy of copper is compensated by much more negative hydration energy of `Cu_((aq))^(2+)`

C

hydration energy of `Cu_((aq))^(2+)` is much more negative than that of `Cu_((aq))^(2+)`

D

many copper (I) compounds are unstable in aqueous solution and undergo disproportionation rection.

Text Solution

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The correct Answer is:
B
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