In chemistry and manufacturing, electrolysis is a technique that uses a direct electric current to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell.
It is the process of refinning the metal by using electricity.

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Electrolysis\xa0is a process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through the aqueous/molten form of the ionic substance. For\xa0electrolysis\xa0to work, the ions of the ionic substance\xa0must be free to move. Ions are free to move when an ionic substance like sodium chloride (NaCl) is dissolved in water (aqueous form) or when melted.

It is a process through which electricity is passed through the solution of salt

Electrolysis is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.\tIonic compounds contain charged particles called ions. For example, Sodium Chloride contains positively charged Sodium ions and negatively charged Chlorine ions.\tThe ions must be free to move in order to start the electrolysis process. When an ionic substance is dissolved in water or melted then the ions are free to move. During electrolysis, positively charged ions move to the negative electrode and negatively charged ions move to the positive electrode. Then positively charged ions receive electrons and negatively charged ions lose electrons. Both the products of the dissociation get collected at the electrodes.\tFor instance, if electricity is passed through molten sodium chloride, the sodium chloride is broken into sodium and chlorine and they collect at their respective electrodes. The metals get precipitated and the gases escape. This ability to break down substance with current is used in many ways.\tElectrolysis is widely used for Electroplating.\xa0