21. the effective resistance of a i cm electrode electrolyte interface of hg. h2h at 25°c for an overpotential less than 10 mv is: igiven: the exchange current

21. The effective resistance of a I cm electrode electrolyte interface of Hg. H2H at 25°C for an overpotential less than 10 mV is: Igiven: the exchange current density = 0.79x 10** A cmj (a) 6.8 x 10 ohm (b) 3.3 x 10 ohm ()1.7x 10 ohm )60 ohm