Note : In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion : E_Cell should have a positive value for the cell to function.

Reason : E_cathode<E_anode

E_cellshouldhave a positive value for the cell to function. As,we know,

Δ_rG_cell = -nFE_cell

Where, Δ_rG_cell= Gibbs free energy of the reaction.

For the proper functioning of the cell, the reaction must be spontaneous, i.e., Δ_rG_cellshould have a negative value and this is true only when E_cellhave a positive value.

We know, E_cell= E_cathode – E_anode

For reaction to be spontaneous, E_cellshould have a positive value. This is true only when E_cathode>E_anode.