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How metals are extracted from their ores

10th grade (Year 11 in England) · 16 questions · Common Core: NGSS.HS-ESS3-2, NGSS.HS-PS1-2 · England: GCSE Combined Science: Chemical changes (extraction of metals), GCSE Chemistry: Using resources

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Score/ 16

1
Question 1
How is tin usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal
2
Question 2
Phytomining grows plants on land containing low-grade copper ore. How does it work?
- A. Plants turn copper into gold
- B. Plants release copper gas
- C. Plants dig up the ore
- D. Plants absorb copper compounds; they are burned and copper is extracted from the ash
3
Question 3
Extracting metals: which statement is NOT true?
- A. An ore is a rock containing enough metal to make extraction worthwhile.
- B. Life cycle assessments compare the environmental impact of products.
- C. Gold is found uncombined because it is very unreactive.
- D. Aluminium can be extracted by heating its oxide with carbon.
4
Question 4
How is zinc usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal
5
Question 5
In a blast furnace, iron oxide is heated with carbon (coke). What happens to the iron oxide?
- A. It is reduced: oxygen is removed
- B. It is oxidised: oxygen is added
- C. It melts and stays as iron oxide
- D. It turns into carbon
6
Question 6
Extracting metals: which statement is NOT true?
- A. Reduction always means adding oxygen.
- B. Life cycle assessments compare the environmental impact of products.
- C. An ore is a rock containing enough metal to make extraction worthwhile.
- D. Carbon can reduce zinc oxide to zinc.
7
Question 7
How is potassium usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal
8
Question 8
Phytomining grows plants on land containing low-grade copper ore. How does it work?
- A. Plants release copper gas
- B. Plants turn copper into gold
- C. Plants dig up the ore
- D. Plants absorb copper compounds; they are burned and copper is extracted from the ash
9
Question 9
Extracting metals: which statement is NOT true?
- A. Gold is found uncombined because it is very unreactive.
- B. Metal ores will never run out.
- C. An ore is a rock containing enough metal to make extraction worthwhile.
- D. Life cycle assessments compare the environmental impact of products.
10
Question 10
How is lead usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal
11
Question 11
Bioleaching uses bacteria to extract copper. What is a drawback?
- A. It only works on gold
- B. It is slow and can produce toxic leachate
- C. It releases large amounts of carbon monoxide
- D. It needs huge amounts of electricity
12
Question 12
Extracting metals: which statement is NOT true?
- A. Gold is found uncombined because it is very unreactive.
- B. Reduction always means adding oxygen.
- C. Carbon can reduce zinc oxide to zinc.
- D. An ore is a rock containing enough metal to make extraction worthwhile.
13
Question 13
How is aluminium usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal
14
Question 14
Why is recycling aluminium cans so worthwhile?
- A. New aluminium is radioactive
- B. Aluminium cannot be extracted from ore
- C. It uses about 5 % of the energy needed to extract new aluminium
- D. Recycling makes aluminium heavier
15
Question 15
Extracting metals: which statement is NOT true?
- A. Gold is found uncombined because it is very unreactive.
- B. An ore is a rock containing enough metal to make extraction worthwhile.
- C. Metal ores will never run out.
- D. Carbon can reduce zinc oxide to zinc.
16
Question 16
How is gold usually obtained?
- A. electrolysis
- B. reduction with carbon
- C. found as the native metal

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