Question
What is electroplating? Explain how it is done.
✓
Answer
- Electroplating is one of the most common applications of chemical effects of electric current.
- The process of depositing a layer of one metal over the surface of another metal by passing an electric current is called electroplating.
- Take a glass jar and fill it with copper sulphate solution.
- Take a copper metal plate and connect it to the positive terminal of the battery.
- Connect an iron spoon to the negative terminal of the battery.
- Now, dip them in the copper sulphate solution.
- When an electric current is passed through the copper sulphate solution, you will find that a thin layer of copper metal is deposited on the iron spoon and an equivalent amount of copper is lost by the copper plate.
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2. The bouncing back of sound wave when it strikes a hard surface.
4. Form of matter of fixed shape other than liquid or gas.
6. Maximum distance moved by a vibrating body form its position of rest.
8.Waves which need a material medium for its propagation.
10. A kind of raepid to and fro motion of an object.
Down:
1. A unit used to measure the loudness or intensity of sound.
3. Sound wave whose frequency is too high to be heard by humans.
5. Sound wave whose frequency is too low to be heard by humans.
7. A reflection of sound.
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4. The total number of protons and neutrons present in the nucleus of an atom.
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