) When electric current is passed through water, its decomposition takes place and gas bubbles are formed at electrodes. (i) Name the electrode and electrolyte used in above activity. (ii) Which gas bubbles are formed at a) Cathode b) Anode (iii) Why do we add few drops of acid or small amount of salt in the above set up? (b) ’Both taps, car bumpers’ are coated with chromium. Why? (c) Çertain metals are extracted from their ores by the process of electrolysis’. Name the process. OR (a) Give reason for the following :- (i) It is not safe to carry out electrical repairs outdoors during a heavy downpour. (ii) Solid sodium chloride does not conduct electricity while sodium chloride solution conducts. (b) State any three uses of electroplating.
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