Which of the Following Are Decomposition Reactions?
1 $\rightarrow$ CO₂ (G) + H₂O (L)
2

question 68

Multiple Choice

Which of the following are decomposition reactions?
1. CH₄ (g) + O₂ (g) $\rightarrow$ CO₂ (g) + H₂O (l)
2. CaO (s) + CO₂ (g) $\rightarrow$ CaCO₃ (s)
3. Mg (s) + O₂(g) $\rightarrow$ MgO (s)
4. PbCO₃ (s) $\rightarrow$ PbO (s) + CO₂ (g)

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

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