What conditions will cause a redox reaction to be nonspontaneous?
O
A. The reduced element is higher on the potential list than the
oxidized element.
O
B. The sum of the voltages of the oxidation and reduction half-
reactions is negative.
O
C. The sum of the voltages of the oxidation and reduction half-
reactions is positive.
O
D. The half-reaction for the reduced element has a negative standard
potential.

For apex the answer is b