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GCSE
Gcse Chemistry
Metals - Extraction Of Metals
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Q.1
One reason for researching new methods to extract copper from low grade ores is...
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more copper is being found
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less copper is being used
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low grade ores contain a large amount of copper
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the price of copper has risen significantly
Q.2
Why is aluminium extracted using electrolysis?
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Aluminium is more reactive than carbon
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Electrolysis is a cheap process
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Aluminium is less reactive than carbon
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Very little energy is required for electrolysis
Q.3
Which of the following shows a balanced chemical equation for the reduction of iron ore in the blast furnace?
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Fe2O3 +3CO → 2Fe +3CO2
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Fe2O3 +2CO → Fe +3CO2
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Fe2O3 +CO → Fe +CO2
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Fe2O3 +3CO → 2Fe +CO2
Q.4
Metals can be extracted from low grade ores using plants. This process is called...
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Photomining
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Phytomining
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Bioleaching
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Electrolysis
Q.5
Choose the correct order of reactivity for the five metals.
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Mg, Al, Zn, Fe, Sn
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Al, Zn, Fe, Sn, Mg
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Al, Mg, Fe, Zn, Sn
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Sn, Zn, Fe, Al, Mg
Q.6
Ores are the starting point for extracting metals because...
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ores contain enough metal to make it economically viable
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it is easy to extract metals from ores
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there are large amounts of metal in ores
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ores are found in many locations
Q.7
Which of these metals is found as itself rather than in a compound?
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Sodium
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Iron
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Aluminium
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Gold
Q.8
If aluminium cans are not recycled, they can affect the environment by...
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producing poisonous gases
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causing acid rain
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filling up landfill sites
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corroding rapidly in rivers and lakes
Q.9
Which of the following is a disadvantage of extracting copper by bioleaching?
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Bioleaching uses low grade ores
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Bioleaching is slower
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Bioleaching is more economical
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Bioleaching uses less energy
Q.10
Copper can be obtained from its ore by displacement using scrap iron because...
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copper is more reactive than iron
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iron is more reactive than copper
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scrap iron is cheaper than copper
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copper reacts with iron
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