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You may use an HB pencil for graphs and diagrams.  \n• Complete the boxes above with your name, centre number and candidate number.  \n• Answer all the questions.  \n• Write your answer to each question in the space provided.  \n• Additional paper may be used if required but you must clearly show your candidate number, centre number and question number(s) .  \n• Do not write in the barcodes.  \nINFORMATION  \n• The total mark for this paper is 90 .  \n• The marks for each question are shown in brackets [ ] .  \n• Quality of extended response will be assessed in questions marked with an asterisk (*) .  \n• This document consists of 28 pages  \n© OCR 2021 J248/01  \n[601/8663/X] D10026/2 .1 Turn over  \nSECTION A  \nAnswer all the questions.  \nYou should spend a maximum of 30 minutes on this section.  \n1 Which technique is the best for separating pure water from a solution of  \nsodium chloride in water?  \nA Chromatography  \nB Crystallisation  \nC Distillation  \nD Filtration  \nYour answer  [1]  \n2 Which statement shows that lead is a metal?  \nA It is a dull grey colour.  \nB It is in Group 4 of the periodic table.  \nC It is in Period 6 of the periodic table.  \nD It is malleable and can be easily shaped.  \nYour answer  [1]  \n3 When 12 g of carbon (C) burns in oxygen (O2 ), 44 g of carbon dioxide (CO2 )  \nis formed.  \nWhat mass of C would burn to form 11 g of CO2?  \nA  \nB  \nC  \nD  \n3 g  \n4 g  \n11 g  \n12 g  \nYour answer  \n[1]  \n4 What is the relative formula mass of sodium carbonate, Na2CO3?  \nA 83.0  \nB 90.0  \nC 106.0  \nD 130.0  \nYour answer  [1]  \n5 The size of a nanoparticle is similar to the size of a molecule.  \nWhat is the approximate size of a nanoparticle?  \nA 0.01 nm  \nB 50 nm  \nC 1000 nm  \nD 10,000 nm  \nYour answer  [1]  \n6 Two isotopes of neon are  \n2210 Ne and 2010 Ne  \nThe two isotopes of neon have different:  \nA Charges  \nB Numbers of electrons  \nC Numbers of neutrons  \nD Numbers of protons  \nYour answer  [1]  \n7 The bar chart shows the melting points of Group 1 elements.  \nWhat are the melting points of rubidium and caesium?  \n\n|  | Melting point of rubidium (°C) | Melting point of caesium (°C) |\n| --- | --- | --- |\n| A | 39 | 29 |\n| B | 40 | 25 |\n| C | 29 | 41 |\n| D | 41 | 25 |\n\nYour answer  [1]  \n8 A student separates the colours of black ink using paper chromatography.  \n• He puts a spot of black ink onto a piece of filter paper.  \n• He dips the filter paper into ethanol in a beaker.  \nWhat phase describes ethanol in this experiment?  \nA Gas phase  \nB Mobile phase  \nC Solid phase  \nD Stationary phase  \nYour answer  \n[1]  \n9 Look at the chromatogram.  \nWhat is the Rf value of the green spot? Use a ruler to help you.  \nA  \nB  \nC  \nD  \n0.17 0.42 0.83  \n1.00  \nYour answer  [1]  \n10 What is the best description of the particles in a liquid?  \n\n|  | Distance between particles | Movement of particles |\n| --- | --- | --- |\n| A | Close together | in continuous random motion |\n| B | Close together | vibrating about a fixed point |\n| C | Far apart | in continuous random motion |\n| D | Far apart | vibrating about a fixed point |\n\nYour answer  \n[1]  \n11 Look at the table of fractions from the fractional distillation of crude oil.  \n\n| Fraction | Boiling range (°C) |\n| --- | --- |\n| LPG | less than 25 |\n| petrol | 85 – 105 |\n| diesel | 150 – 290 |\n| fuel oil | 290 – 380 |\n| bitumen | greater than 400 |\n\nA hydrocarbon has a boiling ","cbCaiuASsEjxTr63","https://ap.wps.com/l/cbCaiuASsEjxTr63","pdf",1630845,48,"English","# SECTION A\n## Multiple-choice questions 1-15\n# SECTION B\n## Questions 16+ (exothermic/endothermic investigation)","[{\"question\":\"What equipment is required or allowed for this paper?\",\"answer\":\"You must have the Data Sheet. A scientific or graphical calculator may be used, and a ruler may be used.\"},{\"question\":\"How much time is allowed for the paper?\",\"answer\":\"The time allowed is 1 hour 45 minutes, with a maximum of 30 minutes recommended for Section A.\"},{\"question\":\"How are marks and question parts presented in the paper?\",\"answer\":\"The total mark is 90. Marks for each question are shown in brackets [ ], and quality of extended response is assessed in questions marked with an asterisk (*) .\"}]","Oxford Cambridge and RSA GCSE (9–1) Chemistry A - J248/01 Paper 1 - Sample Question Paper (Foundation Tier) | PDF",121]