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प्रश्न
Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory
पर्याय
in the nearby river
in the nearby pond
in the nearby cornfield
according to the disposal guidelines of the local authority
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उत्तर
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.
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संबंधित प्रश्न
Prepare a list of objects around you that are electroplated.
Which of the following metals is used in electroplating to make objects appear shining?
The object to be electroplated is taken as ______ electrode.
Electroplating of ______ is done on objects like water taps and cycle bell to give them a shiny appearance.
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.
Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and set up a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of?
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.
