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Download Actual 2024 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H QP + Mark Sche and more Exams Chemistry in PDF only on Docsity!
Actual 2024 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H QP + Mark Scheme AQA# Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature | declare this is my own work. GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H Tuesday 11 June 2024 Morning Time allowed: 1 hour 15 minutes Materials For this paper you must have: * aruler Question Mark * ascientific calculator e the periodic table (enclosed). For Examiner's Use Instructions e 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). ยข Do all rough work in this book. Cross through any work you do not want to be marked. e Inall calculations, show clearly how you work out your answer. olalslwlry|s TOTAL Information ยข The maximum mark for this paper is 70. e The marks for questions are shown in brackets. ยซ You are expected to use a calculator where appropriate. e You are reminded of the need for good English and clear presentation in your answers. 64c2H01 8464/C/2H IB/M/Jun24G4005/E7 Do not write outside the box There are no questions printed on this page DO NOT WRITE/ON THIS PAGE ANSWER IN THE/SPACES PROVIDED MIN IB/M/Jun24/8464/C/2H 2 Do not write outside the [o[1].[3] Crude oil is a mixture of hydrocarbons. โbox Figure 1 represents industrial equipment used to separate crude oil into fractions. Figure 1 Decreasing temperature Crude oil โ> Heat Explain how crude oil is separated into fractions. Use Figure 1. [4 marks] INI IB/M/Jun24/8464/C/2H 4 Do not write outside the [o[1].[4] The alkane molecule C14H3o can be cracked to produce smaller molecules. bok Balance the equation for the reaction. [1 mark] C1s4H30 โ CaHie + C3He Question 1 continues on the next page Turn over > 05 IB/M/Jun24/8464/C/2H 5 Do not write outside the Some factors affect the rates of chemical reactions. bok [o[2].[1] A student investigated the effect of changing the particle size of calcium carbonate on the rate of reaction with hydrochloric acid. Figure 3 shows the apparatus. Figure 3 Delivery tube |-โ Carbon dioxide Stopper =|โ Measuring cylinder Conical flask Hydrochloric acid. Calcium carbonate Water Describe a method the student could use to produce valid results. [6 marks] Turn over > IMM IB/M/Jun24/8464/C/2H 7 Do not write outside the [o[2].[2| The student investigated the effect of increasing the temperature on the box 08 rate of a reaction. Explain the effect of increasing the temperature on the rate of a reaction. Refer to particles and collisions in your answer. [3 marks] IB/M/Jun24/8464/C/2H 8 10 Do not write outside the Some fractions of crude oil are processed to produce fuel for transport. bok [o[3|.[1] Describe how crude oil was formed. [4 marks] INI IB/M/Jun24/8464/C/2H 10 11 Do not write 2 _ outside the Transport is a source of atmospheric pollutants. box [o[3].[2] Suggest how sulfur dioxide can be produced by transport. [2 marks] [o|3].[3| Give two problems caused by sulfur dioxide as an atmospheric pollutant. [2 marks] Question 3 continues on the next page Turn over > INI IB/M/Jun24/8464/C/2H 11 13 Do not write outside the Printer ink is a mixture of chemicals. A student used chromatography to investigate the colours in a printer ink. The student put a spot of the printer ink on the start line. Figure 4 shows the results. Figure 4 |- Solvent front Blue Yellow โโโ_โ_โโโโ Red Start line โโโ a Not to scale [o[4].[1] Explain why the red colour did not move from the start line. [2 marks] Question 4 continues on the next page Turn over > 13 IB/M/Jun24/8464/C/2H box 13 14 Do not write outside the [o[4].[2| The blue colour moved 6.4 cm up the chromatogram. bok The R; value of the blue colour is 0.87 Calculate the distance moved by the solvent. Give your answer to 2 significant figures. [4 marks] Distance moved by the solvent (2 significant figures) = cm INI IB/M/Jun24/8464/C/2H 14 [o[s][4] [o[5][2] 16 16 Sulfuric acid is produced by an industrial process. In the process, sulfur dioxide (SO2) reacts with oxygen (O2) to produce sulfur trioxide (SOs). The equation for the reversible reaction is: 2S02(g) + Og) = 2S03(g) The forward reaction releases 198 kJ/mol of energy. What is the amount of energy transferred during the reverse reaction? [1 mark] Tick (โ) one box. < 198 kJ/mol = 198 kJ/mol > 198 kJ/mol The concentration of oxygen is increased. What is the effect on the position of the equilibrium? [1 mark] Tick (W) one box. Equilibrium position shifts to the left Equilibrium position does not change Equilibrium position shifts to the right IB/M/Jun24/8464/C/2H Do not write outside the box 16 17 Do not write itside the [o[5].[3| The pressure is decreased. oon What is the effect on the position of the equilibrium? [1 mark] Tick (โ) one box. Equilibrium position shifts to the left Equilibrium position does not change Equilibrium position shifts to the right [o|5].[4| The temperature is increased. What is the effect on the position of the equilibrium? [1 mark] Tick (โ) one box. Equilibrium position shifts to the left Equilibrium position does not change Equilibrium position shifts to the right [o[5].[5| A catalyst is used in the reaction. Suggest what effect the catalyst has on the position of the equilibrium. Give one reason for your answer. [2 marks] Effect Reason Turn over > 17 IB/M/Jun24/8464/C/2H 17 19 Do not write outside the [6] Determine the time taken for the reaction to reach equilibrium. bok Explain your answer. Use Figure 5. [3 marks] Time s Explanation Question 5 continues on the next page Turn over > IB/M/Jun24/8464/C/2H 19 20 Do not write outside the Figure 6 shows the results for sulfur trioxide. box Figure 6 10 | CH Ht 8 coo EEE EC EC COCO pa | 4 t t Ht tt | vat el = uw {| Number of moles fon COA i. Cot COCO of sulfur cI Ht CI cot COO trioxide S00 2 J 4 cet Sooo Hee HoH t | t t 1 i Ho } f ยฅ: D f. YEEEEEEEE EEE EEE PEE : VA it : of t t 0 50 100 150 200 250 300 Time in seconds Determine the rate of reaction at 60 seconds. [4 marks] Rate = mol/s a8 20 IB/M/Jun24/8464/C/2H 20 
