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Why is E(Ni2+/Ni) more negative than expected?
AVery negative hydration enthalpy
BVery low sublimation enthalpy
CFull d subshell of Ni2+
DHalf-filled d subshell of Ni2+
Answer & Solution
Correct answer: A. Very negative hydration enthalpy
Ni2+ has the most negative hydration enthalpy in the row, which makes its electrode potential unusually negative.
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