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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?
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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.
संबंधित प्रश्न
Name three liquids, which when tested in the manner shown in Figure, may cause the magnetic needle to deflect.
Prepare a list of objects around you that are electroplated.
Electroplating is an example for ______.
One of the most common applications of chemical effect of electric current is ______.
Why is tin electroplated on iron to make cans used for storing food?
The terminal which is connected to a positive terminal of a battery is called ______.
Liquids that conduct electricity are the solutions of ______.
______ is used in the extraction and purification of metals.
Match the following
| 1. | Anode | a. | Conducting solution |
| 2. | Cathode | b. | Positive terminal |
| 3. | Ions | c. | Negative terminal |
| 4. | Electrolyte | d. | Positively or negatively charged |
Name the process which shows the chemical effect of electric current?
