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2021 BGCSE Chemistry Paper-1 Question-21
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Q-50
In some older-style food packaging the following reaction takes place. 4Fe(s) + 3O₂(g) ⟶ 2Fe₂O₃(s) ΔH = -1,625 kJ Which type of chemical reaction is occurring in the above equation?
displacement
electrolysis
exothermic
galvanising
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