Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Yes, Copper from the copper sulphate solution will be deposited on the carbon rod. When electric current is passed through the copper sulphate solution, copper sulphate dissociates into copper and sulphate.
The free copper gets drawn to the electrode connected to the negative terminal of the battery, i.e. carbon rod and gets deposited on it.
Thus, Paheli will obtain a coating of copper on carbon rod.
APPEARS IN
संबंधित प्रश्न
Electroplating is an example for ______.
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
Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
Why is tin electroplated on iron to make cans used for storing food?
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.
|
(a) |
|
______ |
|
(b) |
|
______ |
|
(c) |
|
______ |
|
(d) |
|
______ |
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 |
What are anodes and cathodes?
