Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta-700 032 Manuscript received 10 June 1981, accepted 10 March 1983 Electrolysis of aqueous solutions of different electrolytes reveals that (i) the occurrence of non-Faradaic behaviour is a general phenomenon with practically all electrolytes provided the current density and/or electrolyte concentration is low ; the behaviour tends to become Faradaic at higher concentration, the threshold concentration depending upon the nature of the electrolyte ; (ii) of the different organic and Inorganic salts of alkali metals, sulphates produce more anomalous results, the extreme anomaly being associated with the sodium sulphate solution ; (iii) with heavy metal sulphates, electrolysis causes deposition of metal at the cathode and no co-liberation at the anode ; (iv) an oxidant and a reductant serve as depolariser at the cathode and anode, respectively and the gas liberation at the depolariser��reactive electrode is suppressed, the gas volume at the other electrode being nearly Faradaic with no or a little co-liberatien.