E Answer the following questions briefly.
1. Mention two applications of electroplating.
2. Name the gases that are obtained during the electrolysis of water.
3. What is the advantage of a dry cell over a wet cell?
Answer the following questions in detail.
1. Explain the method of copper plating an iron nail.
2. What is an electrolytic cell? Draw its schematic diagram.
3. Draw a schematic diagram of the set-up for electrorefining copper.
4. What are electrodes and how do they function?
5. Explain the working of a dry cell ?
answer the following ques briefly.
4 . Seawater is a better conductor of electricity than tap water. Why?
5. How do you choose an electrolyte for electroplating a given metal on another metal?
Answers
Answer:
1.Three uses of electroplating are-
i-Tin cans used for storing food are made by electroplating tin metal on to iron.
ii-it is used in bicycle to resist rust or corrosion.
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2. In the electrolysis of water the gas collected at cathode is hydrogen and the gas collected at anode is oxygen. ii The gas which is collected in double the amount during the electrolysis of water is hydrogen. ... iii Pure water is a bad conductor of electricity.
3. Dry Cell Advantages
Most wet cell batteries are sensitive to orientation; to prevent leaking, you must keep them upright. By contrast, dry cells can be operated in any position. Also, since dry cells are more durable, they are typically used for remote controls, flashlights and other similar handheld devices.
Answer:
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