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Answer each question and check where every mark went.
✓0 of 37 marks so far
Structured questions0 / 4
- 1
Question 1
This question is about the atmosphere and air pollution.
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9 marksOpen › - 2
Question 2
This question is about nitrogen compounds and reducing pollution.
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10 marksOpen › - 3
Question 3
Iron is extracted from its ore, hematite (mainly Fe₂O₃), in a blast furnace. Some reactions in the furnace are shown: equation 1 C + O₂ → CO₂ equation 2 CO₂ + C → 2CO equation 3 Fe₂O₃ + 3CO → 2Fe + 3CO₂ equation 4 CaO + SiO₂ → CaSiO₃
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9 marksOpen › - 4
Question 4
This question is about zinc, the protection of iron, and alloys.
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9 marksOpen ›