A standard hydrogen electrode has zero electrode potential because :

Options

A. Hydrogen is easier to oxidise
B. This electrode potential is assumed to be zero
C. Hydrogen atom has only one electron
D. Hydrogen is the lightest element

Answer

B

Explanation

Standard hydrogen electrode is a reference electrode. Potential of any half cell is calculated with respect to standard hydrogen electrode (SHE). Hence, electrode potential of SHE has been arbitrarily taken to be zero.