Submitted by examrobotsa on Mon, 05/05/2014 - 09:20 When items of jewellery made of metals such as copper or nickel are placed in a solution having a salt of gold, a thin film of gold is deposited bycooling to below 0 degree C heating above 100 degree Cpassing an electric currentjust keeping it for 10 minutes stats: 0,336,352,56,136,440,56