What reactions take place at the cathode and the anode when each of the following is electrolyzed? (Assume standard conditions.) (a) 1.0 M NiBr₂ solution
a) Cathode: Ni deposition; Anode: Br₂ evolution
b) Cathode: Br₂ evolution; Anode: Ni deposition
c) Cathode: H₂ evolution; Anode: O₂ evolution
d) Cathode: Ni dissolution; Anode: Br₂ evolution