Advertisements
Advertisements
प्रश्न
The object to be electroplated is taken as ______ electrode.
Advertisements
उत्तर
The object to be electroplated is taken as negative electrode.
Explanation:
The object to be electroplated is taken as negative electrode or cathode, so that the free ions get deposited on it.
APPEARS IN
संबंधित प्रश्न
Name three liquids, which when tested in the manner shown in Figure, may cause the magnetic needle to deflect.
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?
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 ______.
Paheli set up an experiment using liquid A in the beaker as shown in the following figure. She observed that the bulb glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain.
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) |
|
______ |
Explain the following:
Short circuit.
The terminal which is connected to a positive terminal of a battery is called ______.
______ is used in the extraction and purification of metals.
Assertion: Parts of cars and bicycles are made iron with chromium coating.
Reason: Chromium does not corrode and resist scratches.
