Metal Extraction and Reactivity Series
Quiz by Aji Budiyanto
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10 questions
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- Q1How 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
- Q2Bauxite is the ore of ...ZincIronAluminiumCopper30s
- Q3Blende is the ore of...AluminiumIronCopperZinc30s
- Q4he 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, goldSodium, silver, magnesium, lead, mercurySodium, magnesium, , copper, aluminium, silverPotassium, sodium, silver, magnesium, aluminium30s
- Q5Give 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 waste30s
- Q6The balanced equation for the reactions taking place at the negative electrode in the electrolysis of alumina is:Al → Al3+ + 3e–Al+ + e– → AlAl3+ + 3e– → Al3Al+ + 3e– → Al30s
- Q7Stainless steel is an alloy consisting of iron and a non-metal. What is this non-metal?SiliconCarbonCopperSulfur30s
- Q8The 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 + 2CO2Fe2O3 + 3CO → 2Fe + 3CO2Fe2O3 + 3CO2 → 2FeO + 3CO2Fe2O3 + CO → 2FeO + O2 + CO230s
- Q9What is negative electrode for the aluminium extraction?carboncoppersiliconsilver30s
- Q10the another way to extract zinc from the zinc oxide, beside electrolysis is...by using ironby using copperby using leadby using carbon30s