Partial preview of the text
Download 2024 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F QP + Mark Sche and more Exams Chemistry in PDF only on Docsity!
Actual 2024 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Chemistry Paper 2F 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 Foundation Tier Chemistry Paper 2F Tuesday 11 June 2024 Morning Time allowed: 1 hour 15 minutes Materials a For this paper you must have: For Examiner's Use ° a ruler . Question Mark * ascientific calculator e the periodic table (enclosed). 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 7 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 TOTAL marked. ¢ Inall calculations, show clearly how you work out your answer. olalslwlry|s Information e The maximum mark for this paper is 70. e The marks for questions are shown in brackets. e You are expected to use a calculator where appropriate. « You are reminded of the need for good English and clear presentation in your answers. 64cC2F01 8464/C/2F IB/M/Jun24/G4005/E7 Do not write outside the The Earth’s atmosphere has changed during the last 4.6 billion years. box [o[1].[4| What is the approximate percentage of nitrogen and of oxygen in the Earth’s atmosphere today? Draw one line from each gas to the percentage of that gas. [2 marks] Gas Percentage (%) of gas 20 Nitrogen 9 40 60 Oxygen 80 [o[1].[2] The approximate percentage of carbon dioxide in the Earth’s early atmosphere was 95%. Which are two reasons why the percentage of carbon dioxide has decreased since the Earth’s early atmosphere? [2 marks] Tick (v) two boxes. Combustion of fuels Deforestation Dissolving in oceans Photosynthesis Respiration 02 IB/M/Jun24/8464/C/2F 2 Do not write outside the Carbon dioxide is a greenhouse gas. box, [o[1].[4] Which of the following is also a greenhouse gas? [1 mark] Tick (v) one box. Argon Methane Nitrogen Oxygen [o[1].[5| Which of the following is an environmental problem caused by greenhouse gases? [1 mark] Tick (v) one box. Acid rain Climate change Global dimming IMAI IB/MiJun24/8464/C/2F 4 [o|1][6) MUN Calculate the relative formula mass (M,) of carbon dioxide (CO2). Relative atomic masses (A;): C=12 O=16 [2 marks] Relative formula mass of carbon dioxide = Turn over for the next question Turn over > IB/M/Jun24/8464/C/2F Do not write outside the box 5 Different tests can be used to identify chemicals. [o[2].[1} A student measured the melting points of four substances. Table 1 shows the results. Table 1 Substance Melting point in °C A 52 to 54 B 61 c 2 to0 D 80 to 82 Which substance was pure? Give one reason for your answer. Substance Reason [2 marks] Question 2 continues on the next page IMM Turn over > Do not write outside the box IB/M/Jun24/8464/C/2F 7 [o[2][2] Do not write outside the Anhydrous copper sulfate can be used to test for water. box The word equation for the reaction is: anhydrous copper sulfate + water = hydrated copper sulfate Complete the sentence. Choose answers from the box. [o[2].[3] 08 [2 marks] blue green red white yellow When water is added to anhydrous copper sulfate, the colour changes from to The reaction between anhydrous copper sulfate and water is reversible. How does the word equation show that the reaction is reversible? [1 mark] IB/M/Jun24/8464/C/2F 8 10 Do not write outside the Printer ink is a mixture of chemicals. bok [o[3].[1] What is the name given to a mixture that has been designed as a useful product? [1 mark] Tick (Vv) one box. Formula Formulation Fraction A student used chromatography to investigate the colours in a printer ink. Figure 2 shows the chromatogram. Figure 2 Blue ———__—_____@ Solvent front Red ———_}—__® Start line INI IB/M/Jun24/8464/C/2F 10 11 Do not write outside the [o[3].[2| The student used a ruler for the start line. bok What would the student have used to draw the start line? Give one reason for your answer. [2 marks] Reason [o|3].[3| Determine the R; value of the red colour. Use the equation: _ distance moved by colour ‘~ distance moved by solvent [4 marks] Distance moved by red colour Distance moved by solvent Question 3 continues on the next page Turn over > INI IB/M/Jun24/8464/C/2F 11 [o[4|[2] IM 13 Do not write outside the Tap water must be safe to drink. Box. What name is given to water that is safe to drink? [1 mark] Tick (v) one box. Ground water Potable water Waste water Water is sterilised to make the water safe to drink. Which two of the following are used to sterilise drinking water? [2 marks] Tick (v) two boxes. Carbon dioxide Electrolysis Filtration Ozone Ultraviolet light Question 4 continues on the next page Turn over > IB/M/Jun24/8464/C/2F 13 [o}4][3] 14 14 Do not write outside the A student investigated the mass of dissolved solids in samples of river water, box sea water and tap water. This is the method used. 1. Weigh an evaporating basin. 2. Measure 100 cmé of river water. 3. Pour the river water into the evaporating basin. 4. Heat the evaporating basin until all the water has evaporated. 5. Weigh the evaporating basin and dissolved solids. 6. Calculate the mass of dissolved solids in the water. 7. Repeat steps 1 to 6 with sea water and then with tap water. Which is the most suitable equipment to measure 100 cm® of water? [1 mark] Tick (“) one box. Beaker Conical flask Measuring cylinder IB/M/Jun24/8464/C/2F 14 INIT 16 Table 4 shows the mass of different types of ions dissolved in 1 dm? of sea water. Table 4 Type of ion mess of type of ion dissolved in im? of sea water in grams Calcium 04 Magnesium 1.3 Sulfate 2h IB/MiJun24/8464/C/2F Do not write outside the box 16 17 Do not write outside the [0[4].[6] Complete Figure 3. box You should: © complete the scale for the y-axis ¢ plot the data from Table 4 as a bar chart. [3 marks] Figure 3 Mass of ion dissolved in 1dm of sea water 15 in grams 1.0 0.5 0.0 - Calcium Type of ion 10 Turn over for the next question Turn over > IMMA IB/M/Jun24/8464/C/2F 17 19 Do not write outside the [o[5].[2] Drinks cans are made from aluminium. bok An aluminium can has a mass of 15.8 g. 1000 g=1kg Calculate the whole number of aluminium cans that can be made from 4.00 kg of aluminium. [4 marks] Whole number of cans = Question 5 continues on the next page Turn over > TL IB/M/Jun24/8464/C/2F 19 20 [o[5].[3| Table 5 shows three methods used to dispose of wood and steel after use. 20 Table 5 Percentage (%) of material disposed of by each method As waste Recycled Burnt Wood 58 36 6 Steel 15 85 0 Evaluate the sustainability of the disposal of wood and steel. [4 marks] IB/M/Jun24/8464/C/2F Do not write outside the box 20 
