Question

The electrode systems having positive values of standard electrode potentials act as ______ when connected to a standard hydrogen electrode.

Answer 1

The electrode systems having positive values of standard electrode potentials act as cathode when connected to a standard hydrogen electrode.

Explanation:

Electrodes with positive standard electrode potentials have a greater tendency to gain electrons (i.e., get reduced), so they act as cathodes when paired with the standard hydrogen electrode (SHE), which has E° = 0 V.