AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F Version: 1.0 Final *JUN238464C2F01* IB/M/Jun23/E5 8464/C/2F /QUESTION PAPER & MARKING SCHEME/ [MERGED]

GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F Version: 1.0 Final *JUN238464C2F01* IB/M/Jun23/E5 8464/C/2F For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL Tuesday 13 June 2023 Morning Time allowed: 1 hour 15 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information • The maximum mark for this paper is 70. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBINED SCIENCE: TRILOGY Foundation Tier Chemistry Paper 2F F 2 *02* IB/M/Jun23/8464/C/2F 0 1 Crude oil contains a large number of hydrocarbons. 0 1 . 1 Crude oil is a finite resource. What is a finite resource? [1 mark] Tick () one box. A limited resource A renewable resource A sustainable resource 0 1 . 2 What is crude oil formed from? [1 mark] Tick () one box. Plankton Volcanoes Water Do not write outside the box 3 *03* Turn over ► IB/M/Jun23/8464/C/2F Do not write outside the 0 1 box . 3 What type of substance is crude oil? [1 mark] Tick () one box. Compound Element Mixture 0 1 . 4 The hydrocarbons in crude oil are separated into fractions using fractional distillation. Complete the sentences. Choose answers from the box. [2 marks] condense evaporate freeze melt In fractional distillation the crude oil is heated so the hydrocarbons . The fractions collect as the hydrocarbons cool and . Question 1 continues on the next page 4 *04* IB/M/Jun23/8464/C/2F Do not write outside the Hydrocarbons can be cracked to produce more useful molecules. box 0 1 . 5 Complete the sentence. Choose the answer from the box. [1 mark] alloys fertilisers fuels Some products of cracking are useful as . 0 1 . 6 Hydrogen gas is a product of cracking. What is used in the test for hydrogen gas? [1 mark] Tick () one box. Burning splint Glowing splint Limewater 5 *05* Turn over ► IB/M/Jun23/8464/C/2F Do not write outside the box 10 0 1 . 7 5.20 kg of crude oil contains 1.53 kg of LPG (Liquefied Petroleum Gas). Calculate the percentage (%) of LPG in 5.20 kg of crude oil. Give your answer to 3 significant figures. [3 marks] Percentage (3 significant figures) = % Turn over for the next question 6 *06* IB/M/Jun23/8464/C/2F Do not write outside the 0 2 box The Earth’s atmosphere is always changing. 0 2 . 1 Gases in the Earth’s early atmosphere caused changes on the Earth. Draw one line from each change to the gas that caused the change. [2 marks] Change Gas that caused the change Oceans formed Sedimentary rocks formed Ammonia Carbon dioxide Nitrogen Oxygen Water vapour 7 *07* Turn over ► IB/M/Jun23/8464/C/2F Do not write outside the Table 1 shows the percentage of some gases in the atmospheres of box Earth and Mars today. Table 1 Gas Percentage of gas in atmosphere (%) Earth Mars Argon 0.90 1.9 Carbon dioxide 0.04 95 Nitrogen 78 2.6 Oxygen 21 0.20 0 2 . 2 Which gas has the highest percentage in the Earth’s atmosphere? [1 mark] 0 2 . 3 Calculate how many times more carbon dioxide there is in the atmosphere of Mars than in the atmosphere of Earth. Use Table 1. Give your answer in standard form. [3 marks] Number of times more carbon dioxide (in standard form) = 8 *08* IB/M/Jun23/8464/C/2F Do not write outside the Carbon dioxide is a greenhouse gas. box 0 2 . 4 Figure 1 shows the concentration of carbon dioxide in the Earth’s atmosphere from 1960 to 2020. Figure 1 How has the concentration of carbon dioxide in th