AQA GCSE Chemistry Paper 2 Higher Question Paper.

GCSE CHEMISTRY AQA Style 1 of 25 0 1 . 1 0 1 Medicines are designed to treat symptoms or cure illness. Most medicines contain an active ingredient along with other compounds. The active ingredient is the substance that has the desired effect in the body. Medicines are formulations. What is a formulation? [1 mark] Each batch of medicine must be tested to make sure it contains the correct ingredients. Chromatography is used to compare four new batches of a medicine. Figure 1 shows the results. Sample X is the active ingredient. Sample Y is the correct medicine. Samples A - D are the four new batches that were tested. Figure 1 solvent front start line new batches X Y A B C D active ingredient correct medicine 2 of 25 Which of the samples in Figure 1 is a pure substance? Tick one box. [1 mark] C D X Y Explain whether the new batches A, B, C and D contain the correct ingredients. [4 marks] Explain the result for batch B. [2 marks] Question 1 continues on the next page.