Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
The rod of the impure copper plate should be connected to the battery's positive terminal. Because when an electric current is sent through a copper sulphate solution, it separates into copper and sulphate ions. The free copper is drawn to the battery's negative terminal and deposited on it. On the other hand, the impure copper rod connected to the battery's positive terminal would gain back the copper lost in the solution.
APPEARS IN
संबंधित प्रश्न
The process of depositing a layer of any desired metal on another material by means of electricity is called ______.
Prepare a list of objects around you that are electroplated.
Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in the following figure.
 |
 |
| Boojho's Experiment | Paheli's Experiment |
| (A) | (B) |
They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that
Which of the following metals is used in electroplating to make objects appear shining?
Why is tin electroplated on iron to make cans used for storing food?
In the circuit given as figure, Boojho observed that copper is deposited on the electrode connected to the negative terminal of the battery. Paheli tried to repeat the same experiment. But she could find only one copper plate. Therefore, she took a carbon rod as negative electrode. Will copper still be deposited on the carbon rod? Explain your answer.
A chemical reaction happens when electricity passes through various conducting liquids.
Explain the following:
Short circuit.
Liquids that conduct electricity are the solutions of ______.
State some advantages of electroplating.
