Chemistry 5070 · O Level · Rate of reaction

Rate of reaction — practice question

A student made two conclusions about calcium carbonate. Conclusion 1: The reaction with dilute hydrochloric acid happens more quickly with powdered calcium carbonate than with large pieces of calcium carbonate. Conclusion 2: Grinding large pieces of calcium carbonate into powder increases the surface area. Which statement is correct?

  • ABoth conclusions are correct and conclusion 2 explains conclusion 1.
  • BBoth conclusions are correct but conclusion 2 does not explain conclusion 1.
  • CConclusion 1 is correct but conclusion 2 is not correct.
  • DConclusion 2 is correct but conclusion 1 is not correct.

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