Question

1. What is electroplating? On which effect of electric current is it based? Why is electroplating done?

2. Why is chromium used for electroplating?

3. Why are the objects instead of chromium plating not made of chromium itself?

4. Mention two advantages and two disadvantages of electroplating?

5. Which metals apart from chromium are used for electroplating other metals?

Answer 1

Explanation:

1. The process of depositing or coating a layer of any desired metal on the surface of other material by means of electricity is called electroplating. It is one of the most

common applications of chemical effects of electric current.

Electroplating is a very useful process. It is widely used in industry for coating metal objects with a thin layer of a different metal. The layer of metal deposited has some desired property, which the metal of the object lacks. For example, chromium plating is done on many objects to make them shiny and attractive.

2Chromium metal has a shiny appearance and it does not corrode

1. However chromium is expensive and it may not be to make the whole object out of chromium. So the object is made from a cheaper metal and only a coating of chromium over it is done.

4.disadvantage

4.waste formed during 4.waste waste formed during electroplating process is difficult to dispose on environment as it is hazardous to health. It is time consuming process of making multiple coatings on a metal. The apparatus required for electroplating is very costly. during c

advantages

1. Electroplating has many advantages such as the

ability to layer very thin metal to surround objects and enhance their look