STANDARDChemistry-Transition Elements
STANDARD Chemistry Stability of Ions MCQ Question
Type: MCQ-conceptual-Medium
Cu⁺ ion is not stable in aqueous solution because
A
second ionization enthalpy of copper is less than the first ionization enthalpy
B
large value of second ionisation enthalpy of copper is compensated by much more negative hydration energy of Cu²⁺(aq)
C
hydration energy of Cu⁺(aq) is much more negative than that of Cu²⁺(aq)
D
many copper (I) compounds are unstable in aqueous solution and undergo disproportionation reaction.
Correct Answer
Option B
Detailed Explanation
Large value of second ionisation enthalpy of copper is compensated by much more negative hydration energy of Cu²⁺(aq).
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