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Question

Which of the following factors doesn't affect the process of electrolysis?
1) Concentration of the electrolyte
2) Galvanometer
3) Size of the electrode
4) Nature of the metal used
5) Current
6) Voltage
  1. 1 & 3 
  2. only 2
  3. 4 , 5 & 6
  4. 2 , 4 & 5 


Solution

The correct option is B only 2
Let us look at them one by one.
ChangeEffect on Reaction Increased currentIncreased rate of electrolysisIncreased voltageIncreased current, and thereforeincreased rate of electrolysisIncreased concentration of ions inIncreased current, and thereforeelectrolyteincreased rate of electrolysis Increased surface area of electrodesIncreased current, and therefore increased rate of electrolysis Decreased distance between electrodesIncreased current, and thereforeincreased rate of electrolysis Inert electrode to active electrodeElectrode can oxidise
Size of the electrode would increase the surface area. So that also affects electrolysis.
From the above table, it is clear how the variation of such factors affects the process of electrolysis.
We can easily say that the galvanometer doesn't affect the process, although it helps us measure the amount of current passed.

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