A brand new bicycle has shiny handlebar and wheel rims . However ,
if these are accidentally scratched , the shiny coating comes off
revealing a not so shiny surface beneath . You might have also seen
women , using ornaments , Which appear to be made of gold . However,
with repeated use , the golf coating wears off , revealing silver or some
other metal beneath . In both cases , a metal has a coating of another
metal . Electroplating is one of the most common applications of
chemical effect of electric current. It is widely used .
Q. 1 What is meant by electroplating ?
Q. 2 What is the application of chemical effect of electric current in our
daily life ?
Q. 3 Why the objects which have chromium plating are not made of
Chromium itself ?
Q. 4 List any one drawback of electroplating .
Q. 5 Name two metal objects which have a coating of another metal .
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Answer:
1. Electroplating is the process of depositing a layer of one metal over an object made of another metal, utilising the chemical effects of electric current.
2. Electroplating
3. Since Chromium is expensive, it would cost a lot to make the whole object out of Chromium. Rather, a layer of Chromium would be much more cheaper.
4. During the electroplating process, a lot of waste is generated which is difficult to dispose and which causes a health risk. This is a drawback of electroplating.
5. Handlebars of bicycles and imitation jewellery.
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