Chemistry 5070 · O Level · Air quality and climate

Air quality and climate — practice question

The diagram illustrates a section of the carbon cycle. What are processes P, Q and R?

  • AP: combustion; Q: photosynthesis; R: respiration
  • BP: photosynthesis; Q: combustion; R: respiration
  • CP: respiration; Q: combustion; R: photosynthesis
  • DP: respiration; Q: photosynthesis; R: combustion

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