Chapter 14 Chemical Effects of Electric Current Class 8 Notes What Is the Chapter About? Metals such as copper, aluminium are good conductors of electricity while material like rubber plastics are bad conductors of electricity. In the case of liquids, some liquids are good conductors of electricity while a few are bad conductors of electricity. The water obtained from sources such as pumps, wells, ponds and tap are not pure and contain several dissolved salts. Such water is a good conductor of electricity. While distilled water is free of salt and is a bad conductor of electricity. Chemical effects of electric current Passage of current through chemical solutions causes chemical reactions to take place. Chemical effects include: formation of gas bubbles at electrodes deposition of metals at electrodes Changes in solution colour Electrolysis is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them. To ...
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