OCR 2023 GCSE CHEMISTRY A GATEWAY SCIENCE J248/04: PAPER 4 (HIGHER TIER) QUESTION PAPER & MARK SCHEME (MERGED)

2 © OCR 2023 Section A You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. 1 Crude oil is a resource that is being made extremely slowly. Which word describes a resource that is being made extremely slowly? A Finite B Hydrocarbon C Non‑renewable D Petrochemical Your answer [1] 2 The Group 7 element fluorine is a gas at room temperature and pressure. The Group 7 elements show a trend in boiling points going down the group. Which row shows the boiling points of the Group 7 elements? Boiling Point (°C) Fluorine Chlorine Bromine Iodine A – –15 B –188 –34 59 184 C –15 D – Your answer [1] 3 © OCR 2023 Turn over 3 Copper can be extracted from copper ore by heating the copper ore with carbon. Copper can also be extracted by bioleaching. What is an advantage of bioleaching? A It can produce sulfuric acid. B It extracts copper, which is then purified by e