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Metal Extraction and Reactivity Series

Quiz by Aji Budiyanto

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10 questions
Show answers
  • Q1
    How does a sacrificial anode protect a metal?
    It is reduced more readily than the metal.
    It reacts with the metal to give it a greater resistance to corrosion.
    It is more easily oxidised than the protected metal.
    It forms an impenetrable layer over the protected metal.
    30s
  • Q2
    Bauxite is the ore of ...
    Zinc
    Iron
    Aluminium
    Copper
    30s
  • Q3
    Blende is the ore of...
    Aluminium
    Iron
    Copper
    Zinc
    30s
  • Q4
    he electrochemical series is a list of elements in the order in which they tend to lose electrons. From the following select the list which has the elements in decreasing order of reactivity.
    Potassium, magnesium, zinc, silver, gold
    Sodium, silver, magnesium, lead, mercury
    Sodium, magnesium, , copper, aluminium, silver
    Potassium, sodium, silver, magnesium, aluminium
    30s
  • Q5
    Give a reason why it is preferable to obtain aluminium from recycling rather than extracting it from its ore.
    Recycled aluminium is cheaper.
    It is a purer form of aluminium.
    Recycled aluminium has greater strength.
    Recycled aluminium produces waste
    30s
  • Q6
    The balanced equation for the reactions taking place at the negative electrode in the electrolysis of alumina is:
    Al → Al3+ + 3e–
    Al+ + e– → Al
    Al3+ + 3e– → Al
    3Al+ + 3e– → Al
    30s
  • Q7
    Stainless steel is an alloy consisting of iron and a non-metal. What is this non-metal?
    Silicon
    Carbon
    Copper
    Sulfur
    30s
  • Q8
    The blast furnace may be used in the extraction of iron from iron ore. Which one of the following is the correct balanced equation for the reaction between haematite (Fe2O3) and carbon monoxide (CO)?
    Fe2O3 + 3CO → 2FeO + 2CO2
    Fe2O3 + 3CO → 2Fe + 3CO2
    Fe2O3 + 3CO2 → 2FeO + 3CO2
    Fe2O3 + CO → 2FeO + O2 + CO2
    30s
  • Q9
    What is negative electrode for the aluminium extraction?
    carbon
    copper
    silicon
    silver
    30s
  • Q10
    the another way to extract zinc from the zinc oxide, beside electrolysis is...
    by using iron
    by using copper
    by using lead
    by using carbon
    30s

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