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प्रश्न
Prepare a list of objects around you that are electroplated.
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उत्तर
Examples of electroplated objects are as follows:
- Chromium plating is done on different parts of cars, buses and motor cycles to give them a shiny appearance.
- A fine layer of gold is deposited on the silver ornaments and they are called gold-plated ornaments.
- Iron used in constructing a building is coated with a layer of zinc. This protects iron from corrosion and rusting.
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संबंधित प्रश्न
The passage of an electric current through a solution causes ______ effects.
The process of depositing a layer of any desired metal on another material by means of electricity is called ______.
The process that you saw in the image is used for the purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?
Electroplating is an example for ______.
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
One of the most common applications of chemical effect of electric current is ______.
Observe the following circuits carefully. In which circuit will the bulb glow? Write Yes or No in the blank space provided along each of the circuit given in the figure.
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(a) |
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______ |
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(b) |
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______ |
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(c) |
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______ |
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(d) |
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______ |
You are provided with a magnetic compass, an empty matchbox, a battery of two cells and connecting wires. Using these objects, how will you make a tester for testing an electric circuit? Draw the necessary circuit diagram and explain.
A chemical reaction happens when electricity passes through various conducting liquids.
What are anodes and cathodes?
