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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
State the electrode reaction at the anode during electrolysis of:
very dilute sulphuric acid.
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?
Define the term : Electrolysis
Explain electrolysis of lead bromide.
State your observation for the following electrolytic reaction
Aqueous 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.
Name : A positively charged not metallic ion
Choose the correct answer from the option given below:
Which one is weak electrolyte?
Give one example of a substance which contain :
molecules only
Choosing only words from the following list, write down the appropriate words to fill in the blanks (a) to (e) below:
anions, anode, cathode, cations, electrode, electrolyte, nickel, voltameter.
To electroplate an article with nickel requires an (a) ________ which must be a solution containing (b) ________ions. The article to be plated is placed as the (c) _________of the cell in which the plating is carried out. The (d)________ of the cell is made from pure nickel. The ions that are attracted to the negative electrode and discharged are called (e)________.
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.
Complete the sentence by choosing correct words given in brackets.
Electrolysis is the passage of __________ (electricity/electrons) through a liquid or solution accompanied by a __________ ( physical/chemical ) change.
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
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.
Pure water consists entirely of ______.
Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
Write equations to show how X and Y form ions?
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
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
