2023 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/3F Foundation Tier Paper 3 Physical Sciences Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/3F Foundation Tier Paper 3 Physical Sciences Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] Friday 9 June 2023 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: a ruler a protractor a scientific calculator the periodic table (enclosed) the Physics Equations Sheet (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. Do not write outside the box around each page or on blank pages. 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 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL The maximum mark for this paper is 100. 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. (JUN2384653F01) 8465/3F G/LM/Jun23/E6 2 0 1This question is about acids and alkalis. Universal indicator is used to measure the pH of solutions. 0 1 . 1 Which is a pH value of an alkaline solution? [1 mark] Tick ( ) one box. 5 7 9 0 1 . 2Which is a colour of universal indicator in an alkaline solution? [1 mark] Tick ( ) one box. Blue Red Yellow 0 1 . 3 What piece of equipment measures the pH of a solution more accurately than universal indicator? [1 mark] ___________________________________________________________________________________ Do not write outside the box (02) G/Jun23/8465/3F 3 0 1 . 4 Which ion do all acids produce in aqueous solution? [1 mark] Tick ( ) one box. H + OH− O2− 0 1 . 5 The reaction between an acid and an alkali produces water. What is the name of this type of reaction? [1 mark] Tick ( ) one box. Combustion Decomposition Neutralisation Question 1 continues on the next page Do not write outside the box Turn over U (03) G/Jun23/8465/3F 4 0 1 . 6 Sulfuric acid has the formula H2SO4 What is the total number of atoms in the formula H2SO4? [1 mark] Tick ( ) one box. 3 6 7 10 0 1 . 7 0.5 dm 3 of a solution of sulfuric acid contains 9.8 g of sulfuric acid. Calculate the concentration of the solution of sulfuric acid. Use the equation: concentration = mass of sulfuric acid volume of solution [2 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Concentration = _______________________ g/dm3 Do not write outside the box ____ 8 (04) G/Jun23/8465/3F 5 Turn over for the next question DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Do not write outside the box Turn over U (05) G/Jun23/8465/3F 6 0 2Figure 1 shows how the National Grid connects a nuclear power station to houses. Figure 1 Nuclear power station Transmission cables Houses Step-up Step -down transformer transformer 0 2 . 1What is one advantage of generating electricity using nuclear power? [1 mark] Tick ( ) one box. Generating electricity using nuclear power is reliable. Generating electricity using nuclear power produces radioactive waste. Nuclear fuel is non-renewable. Do not write outside the box (06) G/Jun23/8465/3F 7 The step-up transformer increases the efficiency of power transmission. 0 2 . 2 How does the step-up transformer affect the potential difference across the transmission cables? [1 mark] Tick ( ) one box. The potential difference decreases. The potential difference stays the same. The potential difference increases. 0 2 . 3 How does the step-up transformer affect the current in the transmission cables? [1 mark] Tick ( ) one box. The current decreases. The current stays the same. The current increases. 0 2 . 4 How does the step-up transformer affect the energy transferred from the transmission cables to the surroundings? [1 mark] Tick ( ) one box. The energy transferred to the surroundings decreases. The energy transferred to the surroundings stays the same. The energy transferred to the surroundings increases. Question 2 continues on the next page Turn over U (07) G/Jun23/8465/3F Do not write outside the box 8 0 2 . 5 The total power input from the nuclear power station to the National Grid is 2400 MW. efficiency of power transmission = 0.90 Calculate the useful power output in MW. Use the equation: useful power output = efficiency × total power input [2 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Us