question_answer

Why is the \[E{}^\circ \] value of \[M{{n}^{+3}}\text{/}M{{n}^{+2}}\]couple much more positive than \[C{{r}^{+3}}\text{/C}{{\text{r}}^{+2}}\]

A)  Due to larger third ionisation enthalpy of Mn

B)  Due larger third ionisation enthalpy of Cr

C)  Due to smallerfhird ionisation enthalpy of Mn

D)  Due to lesser hydration enthalpy of Cr