Advertisements
Advertisements
प्रश्न
Give one word or phrase for the following:
Electrolytic deposition of a superior metal on a baser metal.
Advertisements
उत्तर
Electroplating
संबंधित प्रश्न
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.
Give reason for the following:
The blue colour of aqueous copper sulphate fades when it is electrolysed using platinum electrodes.
Explain the term:
Electro refining
List out the main applications of electrolysis.
The following question relate to the electroplating of an article with silver.
What ions must be present in the electrolyte?
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).
Mr Ramu wants electrolyte his key chain with nickel to prevent rusting. For this electroplating
(i) Name the electrolyte
(ii) Name the cathode
(iii) Name the anode
(iv) Give the reaction at the cathode
(v) Give the reaction at the anode
Which solution is preferred as electrolyte, CuSO4 or FeSO4?
Write two applications of electrolysis in which the anode diminishes in mass.
