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Question
Which of the following is not an “element + element → compound” type reaction?
Options
C(s) + O2(g) → CO2(g)
2K(s) + Br2(l) → 2KBr(s)
2CO(g) + O2(g) → 2CO2(g)
4Fe(s) + 3O2(g) → 2Fe2O3(s)
Solution
2CO(g) + O2(g) → 2CO2(g)
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