Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Among the reactions shown, which one is exothermic?

  • Acombustion of methane
  • Bcracking of hydrocarbons
  • Cdecomposition of water into hydrogen and oxygen by electrolysis
  • Dphotosynthesis in plants

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