Question

In a daniel cell, if $A(E^o=-0.76C)$ and $B(E^o=-2.36V)$ half cells are taken then:

• A. $B$ acts as anode
• B. $A$ acts as anode
• C. $B$ acts as cathode
• D. cannot be predicted

Answer 1

The correct option is A $B$ acts as anode

Daniel cell converts chemical energy into electrical energy. Lower standard reduction potential is of anode and cathode has higher standard reduction potential. Emf of Daniel cell equals E${}_{red.\left(cathode\right)}$ - E ${}_{red.\left(anode\right)}$. Emf of cell has to be greater than zero for working of cell.