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Chemistry · Oct / Nov 2022 · Paper 11 · Question 34

5070Air quality and climate

Three statements about the carbon cycle are given. 1 The carbon cycle regulates the amount of carbon dioxide in the atmosphere. 2 During photosynthesis, carbon dioxide is produced. 3 Combustion of hydrocarbons requires oxygen. Which statements are correct?

  1. A1 and 2 only
  2. B1 and 3 only
  3. C2 and 3 only
  4. D1, 2 and 3

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Correct answer: B. 1 and 3 only

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