AQA GCSE CHEMISTRY 8462/2F Paper 2 Foundation Tier Question Paper + Mark scheme [MERGED] June 2022 *Jun2284622F01* IB/M/Jun22/E11 8462/2F For Examiner’s Use Question Mark 1

AQA GCSE CHEMISTRY 8462/2F Paper 2 Foundation Tier Question Paper + Mark scheme [MERGED] June 2022 *JunF01* IB/M/Jun22/E11 8462/2F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Time allowed: 1 hour 45 minutes 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. 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 • 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. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE CHEMISTRY Foundation Tier Paper 2 F 2 *02* IB/M/Jun22/8462/2F Do not write outside the 0 1 box This question is about water. A student investigated pure water. The student measured: • the boiling point of pure water • the pH of pure water. 0 1 . 1 Complete the sentences. Choose answers from the box. [2 marks] 0 4 7 10 25 100 Pure water has a boiling point of °C. Pure water has a pH of . 0 1 . 2 What could the student use to measure the pH of pure water? [1 mark] 3 *03* Turn over ► IB/M/Jun22/8462/2F Do not write outside the A different student investigated sea water. box Sea water contains dissolved solids. This is the method used. 1. Measure a 50 cm3 sample of the sea water. 2. Heat the sample until all the water has evaporated. 3. Measure the mass of solid that remains. 4. Repeat steps 1 to 3 three more times. 0 1 . 3 Which two pieces of equipment were needed in this investigation? [2 marks] Tick () two boxes. Balance Measuring cylinder Ruler Thermometer Timer Question 1 continues on the next page 4 *04* IB/M/Jun22/8462/2F Do not write outside the 0 1 box . 4 Table 1 shows the results. Table 1 Sea water sample Mass of solid that remained in grams 1 1.73 2 1.70 3 1.75 4 1.78 Calculate the mean mass of solid that remained. [2 marks] Mean mass = g 0 1 . 5 A 50 cm3 sample of sea water from a different source contained 1.50 g of dissolved solids. Calculate the mass of dissolved solids in 1000 cm3 of this sea water. [2 marks] Mass = g 5 *05* Turn over ► IB/M/Jun22/8462/2F Do not write outside the box 11 Sodium chloride is a dissolved solid in sea water. Sodium chloride contains sodium ions and chloride ions. 0 1 . 6 Complete the sentence. Choose the answer from the box. [1 mark] crimson lilac yellow The student tested sea water for sodium ions using a flame test. The colour of the flame was . 0 1 . 7 Complete the sentence. Choose the answer from the box. [1 mark] brown green white The student tested sea water for chloride ions by adding nitric acid and silver nitrate solution. The colour of the precipitate formed was . Turn over for the next question 6 *06* IB/M/Jun22/8462/2F Do not write outside the 0 2 box This question is about hydrocarbons in crude oil. 0 2 . 1 Table 2 shows information about three fractions obtained from crude oil. Table 2 Fraction Boiling point range in °C A 200–300 B 100–150 C Below 30 Figure 1 shows the fractionating column used to separate fractions A, B and C. Figure 1 The temperature of the fractionating column is: • 30 °C at the top • 400 °C at the bottom. Complete Figure 1 to show where fractions A, B and C are collected. [1 mark] 7 *07* Turn over ► IB/M/Jun22/8462/2F Do not write outside the 0 2 box . 2 Table 3 shows information about three fractions obtained from crude oil. Table 3 Fraction Range of number of carbon atoms in each molecule Petrol 5–12 Diesel oil 15–19 Heavy fuel oil 20–40 Complete the sentences. Choose answers from the box. [2 marks] lower the same higher Compared to petrol, the viscosity of heavy fuel oil is . Compared to petrol, the flammability of diesel oil is . Question 2 continues on the next page 8 *08* IB/M/Jun22/8462/2F Do not write outside the Table 4 box shows the percentage of two fractions obtained from two different sources of crude oil. Table 4 Source Percentage (%) of fraction Kerosene Heavy fuel oil J 13 30 K 4 44 0 2 . 3 Complete Figure 2. You should: • complete the y-axis scale • plot the percentage of the heavy fuel oil fraction obtained from source K. Use Table 4. [2 marks] Figure 2 9 *09* Turn over ► IB/M/Jun22/8462/2F Do not write outside the 0 2 box . 4 Kerosene is in higher demand than heavy fuel oil. Suggest why crude oil from source J is in higher demand than crude oil from source K. Use Table 4. [1 mark] Large hydrocarbon molecules can be cracked to produce smaller hydrocarbon molecules including alkanes. 0 2 . 5 Which two of the following can be used to crack large hydrocarbon molecules? [2 marks] Tick () two boxes. A catalyst A fertiliser Air Ozone Steam 0 2 . 6 Alkanes have the general formula CnH2n+2 Complete the formula of the alkane molecule containing 11 carbon atoms. [1 mark] C11H___ 10 *10* IB/M/Jun22/8462/2F Do not write outside the box 12 0 2 . 7 C2H6 is an alkane. Which type of bond is found in a C2H6 molecule? [1 mark] Tick () one box. A double bond between two carbon atoms. A double bond between two hydrogen atoms. A single bond between two carbon atoms. A single bond between two hydrogen atoms. 0 2 . 8 Which two substances are produced when alkanes completely combust? [2 marks] Tick () two boxes. Carbon Carbon dioxide Carbon monoxide Hydrogen Water 11 *11* Turn over ► IB/M/Jun22/8462/2F Do not write outside the Turn over for the next question box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED 12 *12* IB/M/Jun22/8462/2F Do not write outside the 0 3 This question is about box the Earth’s atmosphere. Table 5 shows: • the estimated percentages of gases in the Earth’s early atmosphere • the percentages of gases in the Earth’s atmosphere today. Table 5 Gas Estimated percentage (%) in the Earth’s early atmosphere Percentage (%) in the Earth’s atmosphere today Nitrogen 1.8 X Oxygen 0.2 20.95 Carbon dioxide 96.0 0.04 Other gases 2.0 0.92 0 3 . 1 Calculate value X in Table 5. [1 mark] X = % 0 3 . 2 Which two other gases may have been in the Earth’s early atmosphere? [2 marks] Tick () two boxes. Ammonia Coal Limestone Methane Poly(ethene) 13 *13* Turn over ► IB/M/Jun22/8462/2F Do not write outside the Algae and plants increased the percentage of oxygen in the Earth’s atmosphere. box The same process in algae and plants decreased the percentage of carbon dioxide in the Earth’s atmosphere. 0 3 . 3 Which process in algae and plants increased the percentage of oxygen in the Earth’s atmosphere? [1 mark] Tick () one box. Fermenta