Q1 of 29 Page 233

Explain the reason of coating of one metal to another metal.


A metal can be corroded when exposed to such weather conditions. Thus, it is coated with another corrosion resistant metal to prevent it from corrosion and scratch.

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2

How many types of electrodes are there is in a battery.

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British chemist, William Nicholson had shown that if electrodes were immersed in water and a current was passed, bubbles of oxygen and hydrogen were produced. What do your understand by bubbles of hydrogen and oxygen?

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Electroplating is a very useful process. Explain how.

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Write any one harm of electroplating.