Which of the Following Are Combustion Reactions

question 55

Multiple Choice

Which of the following are combustion reactions?
1. CH4 (g) + O₂ (g) → CO₂ (g) + H₂O (l)
2. CaO (s) + CO₂ (g) → CaCO₃ (s)
3. PbCO₃ (s) → PbO (s) + CO₂ (g)
4. CH₃OH (l) + O₂ (g) → CO₂ (g) + H₂O (l)

• A) 1 and 4
• B) 1, 2, 3, and 4
• C) 1, 3, and 4
• D) 2, 3, and 4
• E) 3 and 4

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