CBSE  /  Class 8  /  Science  /  Chemical Effects of Electric Current

  • 1. 
    Flow of electron is called

  • electrolyte
  • electroplating
  • electrodes
  • electric current

  • 2. 
    Which is not a non-electrolyte?

  • Ethyl alcohol
  • Sodium chloride
  • Urea
  • Sodium solution

  • 3. 
    An electric lamp glows due to

  • heating effect
  • magnetic effect
  • chemical effect
  • physical effect

  • 4. 
    Electroplating prevents

  • corrosion
  • passing of current
  • dissociation
  • shining

  • 5. 
    Which of the following is not used for electroplating metal articles?

  • Nickel
  • Silver
  • Chromium
  • Sodium

  • 6. 
    Iron objects can be protected by electroplating them with

  • chromium
  • nickel
  • zinc
  • all of these

  • 7. 
    In LEDs, the longer lead (wire) is always connected to the _______ terminal

  • 8. 
    Tap water is a good conductor of electricity while distilled water is not because

  • 9. 
    When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas.

  • 10. 
    When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas.

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