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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (मराठी सेमी-इंग्रजी) इयत्ता ९ वी

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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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.

थोडक्यात उत्तर
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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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पाठ 5: Acids, Bases and Salts - Exercises [पृष्ठ ७३]

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बालभारती Science and Technology [English] Standard 9 Maharashtra State
पाठ 5 Acids, Bases and Salts
Exercises | Q 2. (i) | पृष्ठ ७३

संबंधित प्रश्‍न

Give reasons why Sodium Chloride will conduct electricity only in the fused or aqueous solution state.


Explain why it is preferable to use a number of graphite electrodes as the anode instead of a single electrode, during the above electrolysis.


Write the equation taking place at the anode


Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ______ or when ______.


Define the following term: 

Electrolysis


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.


Give reason for the following:

Ammonia is unionised in the gaseous state but in the aqueous solution, it is a weak electrolyte.


Give reason for the following:

A graphite anode is preferred to other inert electrodes during the electrolysis of fused lead bromide.


Write the difference between with examples:
A strong electrolyte and a weak electrolyte


How electrolysis can be used in extraction of aluminium?


Choose the correct answer from the option given below:
Which among the following cations will discharge with ease at cathode?


Choose the correct answer from the option given below:
Electrolysis of acidulated water is used in the production of


Define or explain the term: Electrolysis.


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      

Name the gas released at the cathode when acidulated water is electrolyzed.


Choose the option to match the description given below. Some letters may be repeated.

A sugar solution with sugar molecules and water molecules.


Give reason for the following:

Potassium is not extracted by electrolysis of its aqueous salt solution.


In the electrolysis method of boron extraction the cathode is made of ______.


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


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