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Applications of Electroplating

In order to o...

Question

In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be :
(a) silver nitrate solution
(b) copper nitrate solution
(c) sodium nitrate solution
(d) copper sulphate solution

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Solution

(a) silver nitrate solution

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Q. When a student put some copper turnings in a colourless solution, he observed that the solution gradually turned blue. The solution is most likely to be :
(1) ferrous sulphate solution
(2) magnesium nitrate solution
(3) silver nitrate solution
(4) copper sulphate solution

Q. In a solution of silver nitrate, a copper plate was dipped. After some time, silver from the solution was deposited on the copper plate. Which metal is more reactive, copper or silver?

Which of the following solutions will not make the bulb in Fig glow?

(a) Sodium chlorides
(b) Copper sulphate
(c) Silver nitrate
(d) Sugar solution in diluted water

Q. An electric current is passed through silver nitrate solution using silver electrodes.

15.28

g of silver was found to be deposited on cathode. What will be the weight of copper deposited on cathode if same amount of electricity is passed through copper sulphate solution using copper electrodes?

Which of the following pairs cannot undergo displacement reaction?

(a) iron sulphate solution and magnesium

(b) zinc sulphate solution and iron

(c) zinc sulphate solution and calcium

(d) silver nitrate solution and copper

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Applications of Electroplating

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