1. Most liquids that conduct electricity are solutions of ____ , _____ or ______
2. When electricity is passed through tap water , the gases ___ and ____ are envolved.
3. Ions may be positively or negatively charged. True or false ?
4. An electric current brings about chemical changes in most conducting _____ ( solids/liquids)
5. During electroplating , copper is deposited at the ____ ( anode /cathode)
6. Expensive metals are protected by electroplating. True or False.​