Question:
Brine is electrolysed by using inert electrodes. The reaction at anode is ________.
(i) Cl–(aq.) →1/2Cl2 (g) + e– ; E°cell = 1.36V
(ii) 2H2O(l) → O2(g0 + 4H+ + 4e- ; E°cell = 1.23V
(iii) Na+(aq) + e- → Na(s) ; E°cell = 2.71V
(iv) H+(aq) + e- → 1/2H2(g) ; E°cell = 0.00V
Solution:
Option (i) Cl–(aq.) →1/2Cl2 (g) + e– ; E°cell = 1.36V is the answer.