Which statement is true about a nickel-cadmium dry cell?(Use the activity series of metals below to help you predict the correct statement.) Most Active Li
K
Ba
Sr
Ca
Na
Mg
Al
Mn
Zn
Fe
Cd
Co
Ni
Sn
Pb
H
Cu
Ag
Hg
Least Active Au

The anode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

The cathode reaction is Cd+2OH−→Cd(OH)2+2e−.

The cathode reaction is Cd+NiO2+2H2O→Cd(OH)2+Ni(OH)2.

The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.