Plating uses only chemical reactions to form the plating; electrolysis, electroplating. The correct answer is option C.
Plating refers to the process of depositing a layer of metal onto a surface using a chemical reaction. There are two main types of plating: electroplating and electroless plating.
Electroplating involves using an electric current to deposit the metal onto the surface. In this process, the metal to be plated is made into a positively charged ion and is attracted to the negatively charged object that is being plated. For example, if you want to plate a copper surface with silver, you would immerse the copper surface in a solution containing silver ions and use an electric current to deposit the silver onto the copper surface.
On the other hand, electroless plating does not require an electric current. Instead, it relies on a chemical reaction to deposit the metal onto the surface. In this process, a reducing agent is used to reduce the metal ions in the plating solution and deposit the metal onto the surface. For example, if you want to electrolessly plate a plastic surface with nickel, you would immerse the plastic surface in a solution containing nickel ions and a reducing agent. The reducing agent would react with the nickel ions to deposit the nickel onto the plastic surface.
Electrolysis is a process that is used in electroplating to drive the metal ions towards the surface to be plated. It involves passing an electric current through an electrolyte solution, which contains the metal ions. The electric current causes the metal ions to move towards the surface and deposit onto it.
Therefore, the correct answer is c. electrolysis, electroplating, as both processes are involved in plating.