Department of Physical Chemistry, Indian Association for the Cultivation o£ Science, Calcutta.-700 032 Manuscript received 10 June 1981, revised 8 December 1981, accepted 26 February 1982 Electrolysis of a sodium sulphate solution at various concentrations and current densities has been studied. Electrolysis of dilute solutions at low current is accompanied by anomalous (non-Faradaic) features. Keeping the current density constant at 1 mA/cm2 non-Faradaic electrolysis becomes Faradaic as the electrolyte concentration is incresed to 10-1 N. The electrolysis of 102 N solution is more or less Faradaic at current density, as low as 20 mA/cm2.