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Chemistry · May / June 2022 · Paper 12 · Question 18

5070Exothermic and endothermic reactions

Which reaction is exothermic?

  1. Acombustion of methane
  2. Bcracking of hydrocarbons
  3. Cdecomposition of water into hydrogen and oxygen by electrolysis
  4. Dphotosynthesis in plants

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Correct answer: A. combustion of methane

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