हिंदी

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.

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प्रश्न

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? 

संक्षेप में उत्तर
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उत्तर

Spoon should be connected to the negative terminal of the battery. The other electrode should be made of silver, so that silver ions get deposited on an iron spoon.

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Effects of Electric Current - Chemical Effects of Electric Current
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अध्याय 14: Chemical Effects of Electric Current - Short Answer Questions [पृष्ठ ८०]

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एनसीईआरटी एक्झांप्लर Science Exemplar [English] Class 8
अध्याय 14 Chemical Effects of Electric Current
Short Answer Questions | Q 14. | पृष्ठ ८०

संबंधित प्रश्न

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.


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?


An electric current can produce


When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates


The object to be electroplated is taken as ______ electrode.


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.


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)


Piece of coal

______

(b)


Iron nail

______

(c)


Eraser

______

(d)


Steel spoon

______

Assertion: Parts of cars and bicycles are made iron with chromium coating.
Reason: Chromium does not corrode and resist scratches.


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