[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-207396-105":59,"doc-detail-207396-en":125},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":118,"head_meta":120,"extra_data":122,"updated_unix":124},105,"en","oxford-cambridge-and-rsa-monday-29-november-2021-morning-gcse-91-chemistry-a-gateway-science-j24804-paper-4-higher-tier","Oxford Cambridge and RSA - Monday 29 November 2021 - Morning GCSE (9–1) Chemistry A (Gateway Science) J248/04 Paper 4 (Higher Tier)","","GCSE (9–1) Chemistry A (Gateway Science) Paper 4 (Higher Tier) from Oxford Cambridge and RSA sets out exam instructions, marking information and guidance for answering. Section A contains multiple-choice questions covering key chemistry topics including hydrocarbons and intermolecular forces, reaction rate factors, early Earth atmosphere gases, the Haber process conditions, percentage yield, rusting reactions, solution concentration and conversions, functional groups, redox half-equations, metal extraction methods, and polymer/ester formation and equilibrium catalysts. It also includes a question comparing batch and continuous fertiliser production processes.",{"@graph":69,"@context":117},[70,84,100],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/oxford-cambridge-and-rsa-monday-29-november-2021-morning-gcse-91-chemistry-a-gateway-science-j24804-paper-4-higher-tier/207396/",{"url":83,"name":65,"@type":85,"author":86,"headline":65,"publisher":89,"fileFormat":92,"inLanguage":63,"description":67,"dateModified":93,"datePublished":94,"encodingFormat":92,"isAccessibleForFree":95,"interactionStatistic":96},"DigitalDocument",{"name":87,"@type":88},"Olivia Brown","Person",{"url":74,"name":90,"@type":91},"DocShare","Organization","application/pdf","2026-09-06","2026-09-05",true,{"@type":97,"interactionType":98,"userInteractionCount":8},"InteractionCounter",{"@type":99},"ViewAction",{"@type":101,"mainEntity":102},"FAQPage",[103,109,113],{"name":104,"@type":105,"acceptedAnswer":106},"What documents and equipment are required for this chemistry exam paper?","Question",{"text":107,"@type":108},"You must have a ruler (cm/mm) and the Data Sheet for GCSE (9–1) Chemistry A. You may use a scientific or graphical calculator and an HB pencil for graphs and diagrams.","Answer",{"name":110,"@type":105,"acceptedAnswer":111},"How long should students spend on Section A?",{"text":112,"@type":108},"A maximum of 30 minutes should be spent on Section A.",{"name":114,"@type":105,"acceptedAnswer":115},"What is the total mark and how are marks awarded on the paper?",{"text":116,"@type":108},"The total mark for the paper is 90. Marks for each question are shown in brackets, and working may receive marks even if the final answer is wrong.","https://schema.org",{"og:url":83,"og:type":119,"og:title":65,"og:site_name":90,"og:description":67},"article",{"robots":121,"canonical":83},"index,follow",{"doc_id":123,"site_id":62},207396,1788599386,{"code":4,"msg":5,"data":126},{"doc_id":123,"user_id":127,"nickname":87,"user_avatar":128,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":129,"file_id":130,"file_url":131,"file_type":132,"file_size":133,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":134,"language":135,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":67,"update_tm":124,"read_time":139},16904993612988,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Oxford Cambridge and RSA  \nMonday 29 November 2021 – Morning GCSE (9–1) Chemistry A (Gateway Science) J248/04 Paper 4 (Higher Tier)  \nTime allowed: 1 hour 45 minutes  \nH  \n*8341157300*  \nYou must have:  \n• a ruler (cm/mm)  \n• the Data Sheet for GCSE (9–1) Chemistry A (inside this document)  \nYou can use:  \n• a scientific or graphical calculator  \n• an HB pencil  \n| Please write clearly in black ink. Do not write in the barcodes. |  |  |  |\n| --- | --- | --- | --- |\n| Centre number |  | Candidate number |  |\n| First name(s)  \u003Cbr>Last name   |  |  |  |\n\nINSTRUCTIONS  \n• Use black ink. You can use an HB pencil, but only for graphs and diagrams.  \n• Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown.  \n• Answer all the questions.  \n• Where appropriate, your answer should be supported with working. Marks might be given for a correct method, even if the answer is wrong.  \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 has 32 pages.  \nADVICE  \n• Read each question carefully before you start your answer.  \n© OCR 2021 [601/8663/X] DC (ST/CB) 300823/8  \nOCR is an exempt Charity  \nTurn over  \n2  \nSECTION A  \nAnswer all the questions.  \nYou should spend a maximum of 30 minutes on this section.  \nWrite your answer to each question in the box provided.  \n1 Butane is a hydrocarbon molecule with a low boiling point.  \nWhich statement about butane is correct?  \nA Butane is a large molecule and has strong intermolecular forces.  \nB Butane is a large molecule and has weak intermolecular forces.  \nC Butane is a small molecule and has strong intermolecular forces.  \nD Butane is a small molecule and has weak intermolecular forces.  \nYour answer  [1]  \n2 Lumps of zinc react with dilute sulfuric acid.  \nWhat change would decrease the rate of this reaction?  \nA Further diluting the sulfuric acid with water.  \nB Using a larger volume of sulfuric acid.  \nC Using warmer sulfuric acid.  \nD Using zinc powder instead of zinc lumps.  \nYour answer  \n[1]  \n3  \n3 The Earth’s early atmosphere formed 4.5 billion years ago.  \nWhich process produced the gases in the Earth’s early atmosphere?  \nA Combustion  \nB Condensation  \nC Photosynthesis  \nD Volcanic activity  \nYour answer  [1]  \n4 What are the conditions usually used for the production of ammonia in the Haber process?  \nN2 + 3H2  2NH3  \nA 200 °C, 450 atmospheres pressure and an iron catalyst  \nB 450 °C, 2 atmospheres pressure and a vanadium(V) oxide catalyst  \nC 450 °C, 200 atmospheres pressure and an iron catalyst  \nD 450 °C, 200 atmospheres pressure and a nickel catalyst  \nYour answer  [1]  \n5 A scientist predicts that they should make 96 tonnes of product in a reaction.  \nThey only actually make 81 tonnes of product.  \nWhat is the percentage yield?  \nA 15%  \nB 19%  \nC 84%  \nD 119%  \nYour answer  \n[1]  \n© OCR 2021 Turn over  \n4  \n6 When iron rusts it forms hydrated iron(III) oxide.  \n4Fe + 3O2  2Fe2O3  \nWhat happens to iron in this reaction?  \nA Iron is decomposed.  \nB Iron is neutralised.  \nC Iron is oxidised.  \nD Iron is reduced.  \nYour answer  [1]  \n7 The concentration of a solution of sodium hydroxide, NaOH, is 0.725 mol / dm3.  \nWhat is the concentration of this solution in g / dm3?  \n(The relative atomic mass, Ar , of H is 1.0, of Na is 23.0 and of O is 16.0) .  \nA 0.018 g / dm3  \nB 29.0 g / dm3  \nC 55.2 g / dm3  \nD 725.0 g / dm3  \nYour answer  [1]  \n8 What is the formula of the functional group in carboxylic acids?  \nA –C=C–  \nB –COOH  \nC –CO2  \nD –OH  \nYour answer  [1]  \n5  \n9 What is the balanced half equation for the formation of bromine from bromide ions?  \nA Br– – e–  Br  \nB Br–  Br – e–  \nC 2Br– – 2e–  Br2  \nD 2Br–  Br2 – 2e–  \nYour answer  [1]  \n10 Metals can be extracted by biological methods.  \nPlan","cbCaifu1OWwOGLYQ","https://ap.wps.com/l/cbCaifu1OWwOGLYQ","pdf",4305032,32,"English","# Section A: Answer all the questions\n## Multiple-choice questions (1–15)","[{\"question\":\"What documents and equipment are required for this chemistry exam paper?\",\"answer\":\"You must have a ruler (cm/mm) and the Data Sheet for GCSE (9–1) Chemistry A. You may use a scientific or graphical calculator and an HB pencil for graphs and diagrams.\"},{\"question\":\"How long should students spend on Section A?\",\"answer\":\"A maximum of 30 minutes should be spent on Section A.\"},{\"question\":\"What is the total mark and how are marks awarded on the paper?\",\"answer\":\"The total mark for the paper is 90. Marks for each question are shown in brackets, and working may receive marks even if the final answer is wrong.\"}]","Oxford Cambridge and RSA - Monday 29 November 2021 - Morning GCSE (9–1) Chemistry A (Gateway Science) J248/04 Paper 4 (Higher Tier) | PDF",81]