Electrolysis Quiz

7 Questions  I  By Lucasyhw
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Chemistry Quizzes & Trivia
Questions to test your basic understanding of Electrolysis

  
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Questions and Answers

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  • 1. 
    Bob is doing an electrolysis experiment and he wants to obtain sodium metal. He has a typical electrolysis set-up with Graphite electrodes. He has a bottle of Sodium Chloride crystals. What should he do with the Sodium Chloride crystals before he starts the experiment , so that he gets the result he wants?
    • A. 

      Put the NaCl crystals into the crucible

    • B. 

      Dissolve the NaCl crystals in water

    • C. 

      Melt the NaCl crystals


  • 2. 
    Bob wants to have a silver coated knife, he knows he can do it using electrolysis. He prepares Silver Nitrate solution as the electrolyte he is going to use. But firstly what should he put at the cathode and anode so that he gets his silver-plated knife?
    • A. 

      Cathode : Knife ; Anode: Silver metal

    • B. 

      Cathode: Silver metal ; Anode: Knife

    • C. 

      It is fine both ways


  • 3. 
    In the electrolysis of Dilute Sulfuric Acid, the gas produced at the cathode can rekindle a glowing splint.
    • A. 

      True

    • B. 

      False


  • 4. 
    In the electrolysis of Copper(II) Sulfate solution, Copper(II) ions are preferentially discharged because of its lower position in the reactivity series as compared to Hydrogen ions.
    • A. 

      True

    • B. 

      False


  • 5. 
    Which of the following is not an inert electrode?
    • A. 

      Platinum

    • B. 

      Mercury

    • C. 

      Graphite


  • 6. 
    In the extraction of aluminium from bauxite, carbon anodes are used. Why must the carbon anodes be constantly changed after a certain period of time?
    • A. 

      The carbon anodes reacted with the electrolyte

    • B. 

      The carbon from the carbon anodes dissolve into the electrolyte and migrates to the cathode

    • C. 

      The oxygen liberated at the anode reacts with the carbon anodes


  • 7. 
    Bob knows why he did not obtain his sodium metal when he electrolysed the sodium chloride solution he prepared. But he is now curious of how come Hydrogen ions can get discharged at the cathode. He came to the conclusion that it is beacause electrons from the current are transferred to the hydrogen ions to make them become hydrogen atoms.
    • A. 

      True

    • B. 

      False


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