Chemistry 0620 · IGCSE · Physical and chemical changes

Physical and chemical changes — practice question

Methane, $\text{CH}_4$, burns in air and produces carbon dioxide plus water. What is the balanced equation for this reaction?

  • A$\text{CH}_4(g) + \text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(g)$
  • B$\text{CH}_4(g) + 2\text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(g)$
  • C$\text{CH}_4(g) + 2\text{O}_2(g) \rightarrow \text{CO}_2(g) + \text{H}_2\text{O}(g)$
  • D$\text{CH}_4(g) + 3\text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(g)$

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