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← HistoryWhich risk increases when charcoal production in a 16th-century blast furnace is not quenched correctly?
A)Structural collapse of the furnace
B)Formation of unusable white cast iron
C)Increased levels of atmospheric pollution
D)Self-ignition of the stored charcoal✓
💡 Explanation
When hot charcoal is exposed to oxygen after removal, oxidation occurs because the large surface area and elevated temperature favour rapid exothermic reactions, leading to self-ignition. Therefore self-ignition results, rather than collapse, white iron, or pollution, which depend on different physical and chemical processes.
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