Advertisements
Advertisements
प्रश्न
Define the following term:
Electrolysis
उत्तर
It is the process of decomposition of a chemical compound in aqueous solutions or in a molten state accompanied by a chemical change using direct electric current.
APPEARS IN
संबंधित प्रश्न
Choose the correct answer from the options given below :
The particles present in strong electrolytes are :
(A) Only molecules
(B) Mainly ions
(C) Ions and molecules
(D) Only atoms
A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?
State the electrode reaction at the anode during electrolysis of:
sodium chloride solution.
Give reason for the following:
Lead bromide undergoes electrolytic dissociation in the molten state but is a non-electrolyte in the solid state.
Give reason for the following:
Carbon tetrachloride is a liquid but does not conduct electricity.
(a) Copy and complete the following table, which refers to two practical applications of electrolysis.
| Anode | Electrolyte | Cathode | |
| (i) Silver plating of a spoon | A solution of potassium argentocyanide | ||
| (ii) Purification of copper | |||
| (iii) Extraction of sodium |
(b) Write the equation taking place at the anode for Q. (a).
How electrolysis can be used in extraction of aluminium? Why aluminium cannot be reduced by conventional reducing agents?
Why is it necessary to add acid to water before proceeding with electrolysis of 'water'?
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?
When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are:
