Electrolysis MCQ Multiple Choice Questions - Page 2 for Practice

Electrolysis MCQ Questions for Practice

16. Which of the following statements about the electrolysis of concentrated potassium iodide solution using graphite electrodes is correct?

A brown colour appears around the cathode
The mass of the graphite electrodes increases
The amount of potassium ions decreases
The pH value of the resultant solution increases

Correct Answer is: The pH value of the resultant solution increases

Show Answer-16

17. Which metal is used in electroplating cans to store food?

Correct Answer is: Sn

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18. Which of the following is a non-electrolyte

Acetic acid
Sugar
Calcium
Potassium

Correct Answer is: Sugar

Show Answer-18

19. Which of the following methods CANNOT reduce the pollution from the electroplating industry?

Recover the metal ions for direct reuse
Precipitate out the heavy metal ions in the effluents
Neutralize the alkaline effluents with excess sulphuric acid
Neutralize the acidic effluents with slaked lime

Correct Answer is: Neutralize the alkaline effluents with excess sulphuric acid

Show Answer-19

20. Which pair of electrolytes is not inert?

Mercury and Carbon
Mercury and sodium
Silver and Carbon
Copper and Silver

Correct Answer is: Copper and Silver

Show Answer-20

21. Which primary cell has the longest life?

Mercury cell
Lithium cell
Carbon zinc cell
Alkaline cell

Correct Answer is: Lithium cell

Show Answer-21

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