मराठी

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? 

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

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

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?


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 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


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

______

You are provided with a magnetic compass, an empty matchbox, a battery of two cells and connecting wires. Using these objects, how will you make a tester for testing an electric circuit? Draw the necessary circuit diagram and explain.


Liquids that conduct electricity are the solutions of ______.


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

Name the process which shows the chemical effect of electric current?


What are anodes and cathodes?


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