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प्रश्न
Element X is a metal with valency 2. Element Y is a non-metal with valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is diatomic gas, write the equation for the direct combination of X and Y to form a compound.
(c) Write two applications of electrolysis in which anode diminish in mass.
(d) 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 the Y at the ________of the electrolytic cell. (Provide the missing words).
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उत्तर
(a) X → X2+ + 2e-
Y + 3e- → Y3-
(b) 3X + Y2 → X3Y2
(c) (i) Electroplating of metals
(ii) Electrorefining of metals
(d) 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 cathode Y at the anode of the electrolytic cell.
APPEARS IN
संबंधित प्रश्न
Name the following :
The process of coating of iron with zinc
Give reasons why In the electroplating of an article with silver, the electrolyte sodium argentocyanide solution is preferred over silver nitrate solution.
State one relevant observation for the following:
At the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.
How would you change Cu2+ ion to Cu?
An electrolytic cell is set up using two platinum electrodes and an aqueous solution of copper (II) sulphate,
(a)draw a labelled diagram of the electrolytic cell,
(b)Name the ions present in the cell,
(c)Name the ions migrating towards the anode,
(d)Name the ions migrating towards the cathode,
(e)Name the ions which will not be discharged at electrodes during electrolysis,
(f)Write the reaction at the cathode,
(g)Write the reaction at the anode,
(h)Name the spectator ion in the solution.
State the electrode reaction at the anode during electrolysis of:
Aqueous copper sulphate solution.
Give three applications of electrolysis.
List out the main applications of electrolysis.
The following question relate to the electroplating of an article with silver.
Name the electrode formed by the article which is to be plated.
Write two applications of electrolysis in which the anode diminishes in mass.
