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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 reasons why Sodium Chloride will conduct electricity only in the fused or aqueous solution state.
Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ______ or when ______.
Give reason for the following:
A graphite anode is preferred to other inert electrodes during the electrolysis of fused lead bromide.
To carry out the so-called “electrolysis of water”. Sulphuric acid is added to water. How does the addition of sulpuric acid produce a conducting solution?
Complete the sentence by choosing correct word given in bracket.
through a liquid or a solution accompanied by a ___________ (Physical / chemical) change.
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.
Write the difference between with examples:
A strong electrolyte and a weak electrolyte
Explain electrolysis of lead bromide.
With reference to the electrolysis of acidulated water, answer the following :
a) why distilled water is a non- electrolyte?
b) What is the electrolytic cell called?
c) State what you would observe at the (i) Cathode (ii) Anode
d) Summarize the electrode reactions.
e) why is electrolysis of acidulated water considered as an example of catalysis?
Fill in the black.
The metal plate through which ____________ leaves from an electrolyte is called ____________ .It has ______________ of electrons.
Fill in the blank :
The ions which discharge on the positive electrode during electrolysis ____________electrons. Thus, the ions are said to be _____________.
Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.
Choose the correct answer from the option given below:
Which one is weak electrolyte?
Choose the correct answer from the option given below:
In electrolysis of molten lead bromine anode is made up of
Why is it necessary to add acid to water before proceeding with electrolysis of 'water'?
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
Pure water consists entirely of ______.
Electrolysis is the passage of ______ through a liquid or a solution accompanied by a ______ change.
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:
electrolytic dissociation
