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

2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H 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. *JUN238464C2H01* IB/M/Jun23/E7 8464/C/2H 2 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Do not write outside the box *02* IB/M/Jun23/8464/C/2H 3 0 1The combustion of fuels is a source of atmospheric pollutants. 0 1 . 1 Methane is a fuel. Balance the equation for the combustion of methane. [1 mark] CH4 + O2 → CO2 + H2O 0 1 . 2 Many fuels are mixtures. Petrol and diesel are mixtures of hydrocarbons. Table 1 shows properties of petrol and of diesel. Table 1 Petrol Diesel Range of number of carbon atoms in a hydrocarbon molecule 4 to 12 12 to 20 Range of boiling points in °C 40 to 205 250 to 350 Compare the properties of petrol and diesel. Use Table 1. [2 marks] Do not write outsiide the box Turn over ► *03* IB/M/Jun23/8464/C/2H 4 0 1 . 3 The gases released when a fuel is burned in car engines may include: • oxides of nitrogen • carbon monoxide • water vapour. Which chemical element do all these gases contain