Advertisements
Advertisements
Question
Boojho’s uncle has set up an electroplating factory near his village. He should dispose off, the waste of the factory
Options
in the nearby river
in the nearby pond
in the nearby cornfield
according to the disposal guidelines of the local authority
Solution
according to the disposal guidelines of the local authority
Explanation -
In electroplating factory, the disposal of the used conducting solution is a major concern because it is a polluting waste, therefore it should be disposed off according to the disposal guidelines of the local authority.
APPEARS IN
RELATED QUESTIONS
If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ______ terminal of the battery.
Prepare a list of objects around you that are electroplated.
In an electrolyte the current is due to the flow of ______.
Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in the figure.
![]() |
![]() |
Boojho's Experiment | Paheli's Experiment |
(A) | (B) |
They found that the bulb in the set up A glows more brightly as compared to that of the set up B. You would conclude that
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
Paheli set up an experiment using liquid A in the beaker as shown in the 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) |
Piece of coal |
______ |
(b) |
Iron nail |
______ |
(c) |
Eraser |
______ |
(d) |
Steel spoon |
______ |
Liquids that conduct electricity are the solutions of ______.
Assertion: Parts of cars and bicycles are made iron with chromium coating.
Reason: Chromium does not corrode and resist scratches.
State some advantages of electroplating.