Can You Pass This Electrolysis Quiz?

10 Questions | Total Attempts: 196

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Electrolysis Quizzes & Trivia

In the scientific field of chemistry, the process of electrolysis involves using a direct electric current to garner an otherwise non-spontaneous chemical reaction. What else do you know about the process, how it works and what it’s used for? Answer the following questions and find out for sure!


Questions and Answers
  • 1. 
    What is the charge of a cathode? What ions do it attract?
    • A. 

      Negatively-charged ; cations

    • B. 

      Negatively-charged ; anions

    • C. 

      Positively-charged ; cations

    • D. 

      Positively-charged ; anions

  • 2. 
    In the case of electrolysis with concentrated sulfuric acid as the electrolyte and with inert electrodes, which ions will be discharged at the electrodes?
    • A. 

      Hydroxide ions and hydrogen ions

    • B. 

      Hydroxide ions and sulfate ions

    • C. 

      Hydrogen ions and sulfate ions

    • D. 

      Sulfur ions and hydrogen ions

  • 3. 
    Why must the electrolyte be molten or aqueous when undergoing electrolysis
    • A. 

      So that electrostatic forces of attraction are overcome and the ions are mobile

    • B. 

      So that covalent bonds are overcome and the ions are mobile

    • C. 

      So that van de waals forces are overcome and the electrons are mobile

    • D. 

      So that hydrogen bonds are overcome and electrons are mobile

  • 4. 
  • 5. 
    Graphite can conduct electricity because although it has 4 free electrons, only 3 are used for bonding. Hence, there is 1 free electron for conducting electricity.
    • A. 

      True

    • B. 

      False

  • 6. 
    In the electrolysis of molten NaOH using inert electrodes, what observations will there be at the electrodes?
    • A. 

      Effervescence of green-yellow pungent gas

    • B. 

      Deposits of a black solid

    • C. 

      Effervescence of colourless ordourless gas

    • D. 

      Deposits of yellow solid

    • E. 

      Deposits of silvery-gray solid

  • 7. 
    Why isnt pure water a good eletrolyte?
    • A. 

      Water molecules are held by metallic bonds and do not have mobile electrons or ions

    • B. 

      Water molecules are held by ionic bonds and have no mobile electrons or ions

    • C. 

      Water moleculs are held by covalent bonds and have no mobile electrons or ions

  • 8. 
    In the purification of copper ore, should the impure copper be used as the cathode or anode 
    • A. 

      Anode, so that the impure copper will gain electrons to become copper ion and travel to the pure copper cathode

    • B. 

      Anode, so that the impure copper will lose electrons to become copper ion and travel to the pure copper cathode

    • C. 

      Cathode, so that the impure copper will lose electrons to become copper ion and travel to the pure copper cathode

    • D. 

      Anode, so that the impure copper will gain electrons to become copper ion and travel to the pure copper cathode

  • 9. 
    Why should a DC current be used in electrolysis?
    • A. 

      The charges of the electrodes will be constant, hence the components will stay at the respective electrode

    • B. 

      The electronegativity of the electrodes will be constant, hence the components will stay at the respective electrode

    • C. 

      The temperature of the electrodes will be constant, hence the components will stay at the respective electrode

    • D. 

      The rate of reaction of the electrodes will be constant, hence the components will stay at the respective electrode

  • 10. 
    When the voltage of the battery increases, the current increases, hence the rate of electrolysis decreases.
    • A. 

      True

    • B. 

      False