AQA / AQA GCSE CHEMISTRY 2021 Higher Tier Paper 2 QUESTION PAPER

GCSE CHEMISTRY HIGHER TIER QUESTION PAPER 2 2021 AQA Style GCSE CHEMISTRY Higher Tier Chemistry Paper 2 Time allowed: 1 hour 45 minutes Materials • A pen and pencil • A calculator • Periodic Table of Elements Instructions and Information • Answer all the questions using a black pen. • Answer the questions in the space available and cross out any work you do not want to be marked. • In any calculations make sure you show your working out. • The marks for each question are shown in brackets. • The maximum mark for the paper is 100. • You must make your work as neat as possible and use good English in your answers. • You should make sure you leave time to check your answers. Question Mark 1 2 3 4 5 6 7 8 9 10 Total2 of 25 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