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प्रश्न
Write down the changes that will be seen in each instance and explain the reason behind them.
Dilute H2SO4 was taken in an electrolytic cell and an electric current was passed through it.
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उत्तर
In dilute H2SO4, H+ and `"SO"_4^(2-)` ions are produced due to dissociation. Electric current passes through these ions. During this process H2 gas is produced at the negative side, and O2 gas is produced at the positive side.
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संबंधित प्रश्न
Give appropriate scientific reasons for Electrolysis is of molten lead bromide is considered to be a redox reaction.
Define the term : Electrolysis
From the given list :
NaCl, NaOH, H2O (pure), NH4OH, urea, dil.H2SO4, glucose, acetic acid, H2CO3.
Select :
a) Substances which will behave as strong electrolytes.
b) Substances which will behave as weak electrolytes.
c) Substances which are non-elctrolytes.
Explain electrolysis of lead bromide.
State your observation for the following electrolytic reaction:
Solid copper sulphate is electrolysed between platinum electrodes.
Fill in the black.
The metal plate trough which current enters into an electrolyte is called ___________. It has ____________ of electrons.
Fill in the blank :
Non-metallic ions are _____________ because they _____________ electrons.
How electrolysis can be used in extraction of aluminium? Why aluminium cannot be reduced by conventional reducing agents?
Name : A non-metallic element which is a conductor of electricity.
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 |
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
Identify the following reactions as either oxidation or reduction : Fe+3 + e- → Fe+2
Choose A, B, C or D to match the descriptions (i) to (v) below . Some alphabets may be repeated.
(A) Non-electrolyte, (B) Strong electrolyte, (C) Weak electrolyte, (D) Metallic conductor
(i) Molten ionic compound
(ii) Carbon tetrachloride
(iii) An aluminium wire
(iv) A solution containing solvent molecules, solute molecules and ions formed by the dissociation of solute molecules
(v) A sugar solution with sugar molecules and water molecules.
During the electrolysis of molten lead bromide, which of the following takes place?
Differentiate between the terms strong electrolyte and weak electrolyte (stating any two differences)
State your observation of the following case:
At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes.
Pure water consists entirely of ______.
We can expect that pure water ______ normally conducts electricity.
In the electrolysis method of boron extraction the cathode is made of ______.
