Question

Deduced from the following Eº values of half cells.
what combination of two half cells would result in
a cell with the largest potential?
(0) A2 → A2- + e, E° = 1.5 V
(0) B2+ + e- B, E° = 2.1 V
(ii) C2+ + e- → C, E° = +0.5 V
(1) D D2+ + 2e, E° = -1.5 V
(1) (i) and (iii)
(2) (i) and (ii)
(3) (i) and (iv)
(4) (ii) and (iv)​

Answer 1

first and second riddles