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प्रश्न
Copy and complete the following table which refers to two practical applications of electrolysis.
| Anode | Electrolyte | Cathode | |
| Silver plating of a spoon | Solution of potassium argentocyanide | ||
| Purification of copper |
उत्तर
| Anode | Electrolyte | Cathode | |
| Silver plating of a spoon | Plate of pure clean silver | Solution of potassium argentocyanide | Cleaned article to be electroplated |
| Purification of copper | Impure copper | A solution of copper sulphate and dilute sulphuric acid | Thin strip of pure copper |
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संबंधित प्रश्न
Give reason for the following:
Ammonia is unionised in the gaseous state but in the aqueous solution, it is a weak electrolyte.
How electrolysis can be used in extraction of aluminium? Why aluminium cannot be reduced by conventional reducing agents?
Name : A salt which is a weak electrolyte.
Name : A base which is not alkali
Name : A positively charged not metallic ion
Write down the word or phrase from the given options that will correctly fill in the blanks in the following sentence:
We can expect that pure water _______ normally conduct electricity.
Copy and complete the following sentence :
With platinum electrodes, hydrogen is liberated at the ______and oxygen at the _________ during the electrolysis of acidified water.
Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
108 g of silver (molar mass 108 g mol-1) is deposited at cathode from AgNO3 (aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is ______.
X - \[\ce{HCl <=> H^{1+} + Cl-}\] (in solution state)
Y - \[\ce{PbBr2 <=> Pb^{2+} + 2Br^{1-}}\] (in molten state)
From the above reaction X or Y, identify the reaction which exhibit:
ionization
