Advertisements
Advertisements
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.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give reason for the following:
Aluminium is extracted from its oxide by electrolytic reduction and not by convectional reducing agents.
Give reason for the following:
The ratio of hydrogen and oxygen formed at the cathode and anode is 2 : 1 by volume.
Complete the sentence by choosing correct word given in bracket.
through a liquid or a solution accompanied by a ___________ (Physical / chemical) change.
State your observation for the following electrolytic reaction
Aqueous copper sulphate is electrolysed between platinum electrodes.
Explain, why electrolysis is an example of redox reaction?
Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.
How electrolysis can be used in extraction of aluminium?
Name : A salt which is a weak electrolyte.
Why is it necessary to add acid to water before proceeding with electrolysis of 'water'?
Give one example of a substance which contain :
Ions only
If an electrolyte is described as a 'strong electrolyte' what does this mean?
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
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.
Electrolysis of acidulated water is an example of ______.
Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
If the compound formed between X and Y is melted and an electric current passed through the molten compound, the element X will be obtained at the ______ and Y at the ______ of the electrolytic cell. (Provide the missing words).
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 ______.
When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are:
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:
electrolytic dissociation
