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प्रश्न
Give reason for the following:
The ratio of hydrogen and oxygen formed at the cathode and anode is 2 : 1 by volume.
उत्तर
As per electrolytic reactions, 4H+1 is needed at the cathode and 4OH− at the anode, and two water molecules are produced at the anode. Hence, for every two molecules of water, two molecules of hydrogen and one molecule of oxygen are liberated at the cathode and anode, respectively.
\[\ce{2H2 ->[H2SO4][Current]2H2[cathode] + O2[anode]}\]
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संबंधित प्रश्न
Write the equation taking place at the anode
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magnesium chloride (molten).
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(a) Copy and complete the following table, which refers to two practical applications of electrolysis.
| Anode | Electrolyte | Cathode | |
| (i) Silver plating of a spoon | A solution of potassium argentocyanide | ||
| (ii) Purification of copper | |||
| (iii) Extraction of sodium |
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Give one example of a substance which contain :
Ions only
Give one example of a substance which contain :
both ions and molecules.
Copy and complete the following sentence :
With platinum electrodes, hydrogen is liberated at the ______and oxygen at the _________ during the electrolysis of acidified water.
Give reason for the following:
Potassium is not extracted by electrolysis of its aqueous salt solution.
