The anodic reaction in dry cell is
Zn→Zn+2+2e
Pb→Pb+2+2e
Cd→Cd+2+2e
Ni→Ni+2+2e
Dry cell ;
Anode.......Zn→Zn+2+2e; Cathode....MnO2+NH4++e→MnOOH+NH3;