The correct option is
D Protecting metal against corrosion.
The explanation for correct option:
Option: (a), (b), and (d):
Electroplating:
- Electroplating is the process of depositing a layer of precious metal on another metal, on the passage of an electric current, it is the chemical effect of an electric current.
- In other words electroplating is basically the process of plating a metal onto the other by hydrolysis mostly to prevent corrosion of metal or for decorative purposes.
- The process uses an electric current to reduce dissolved metal cations to develop a lean coherent metal coating on the electrode.
- Electroplating is used to enhance the following qualities,
- Fine shine to the surface,
- Shining appearance,
- Protect metal-like irons from corrosion.
Hence option (a),(b)and (d) is correct option.