Chemistry · May / June 2018 · Paper 11 · Question 19

A student wrote two conclusions about calcium carbonate. conclusion 1 The reaction with dilute hydrochloric acid is faster with powdered calcium carbonate than with large pieces of calcium carbonate. conclusion 2 Grinding large pieces of calcium carbonate to form powder increases the surface area. Which statement is correct?

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

As printed in the paper