2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] 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. For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL 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. *JUN238464C2F01* IB/M/Jun23/E5 8464/C/2F 2 0 1Crude oil contains a large number of hydrocarbons. 0 1 . 1 Crude oil is a finite resource. What is a finite resource? Tick () one box. A limited resource A renewable resource A sustainable resource 0 1 . 2 What is crude oil formed from? Tick () one box. Plankton Volcanoes Water [1 mark] [1 mark] Do not write outside the box *02* IB/M/Jun23/8464/C/2F 3 0 1.3 0 1.4 What type of substance is crude oil? [1 mark] Tick () one box. Compound Element Mixture 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 Do not write outside the box *03* Turn over ► IB/M/Jun23/8464/C/2F 4 Hydrocarbons can be cracked to produce more useful molecules. 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 Do not write outside the box *04* IB/M/Jun23/8464/C/2F 5 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 Do not write outside the box 10 *05* Turn over ► IB/M/Jun23/8464/C/2F 6 0 2 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] Do not write outside the box Change Oceans formed Sedimentary rocks formed Gas that caused the change Ammonia Carbon dioxide Nitrogen Oxygen Water vapour *06* IB/M/Jun23/8464/C/2F 7 Table 1 shows the percentage of some gases in the atmospheres of Earth and Mars today. Table 1 Gas