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Q.

EM+2/M0value is more negative than expected for all the following except

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a

Zn

b

Cu

c

Mn

d

Ni

answer is B.

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Detailed Solution

Due to stable configuration of Mn+2 and Zn+2 theier EM+2/M0 values are more negative than expected. Due to high hydration enthalpy of  Ni+2 its EM+2/M0 value is more negative. EM+2/M0 of cpper is positive due to high hydration enthalpy of  Cu+2
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EM+2/M0value is more negative than expected for all the following except