[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-207397-105":59,"doc-detail-207397-en":124},{"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":117,"head_meta":119,"extra_data":121,"updated_unix":123},105,"en","aqa-gcse-combined-science-chemistry-higher-november-2021-paper-2h-exam-questions","AQA GCSE Combined Science Chemistry Higher - November 2021 Paper 2H - Exam questions","","Higher Tier GCSE Combined Science Chemistry Paper 2H focuses on practical and conceptual chemistry. Questions include planning investigations on reaction rate using magnesium and hydrochloric acid, identifying independent and control variables, plotting and interpreting gas volume data, and explaining how temperature and particle collisions affect reaction rate. Further items cover crude oil and alkane formation, comparing methane and hexane properties, cracking hydrocarbons, testing for alkenes, and using copper sulfate as a water test alongside the meaning of a pure substance.",{"@graph":69,"@context":116},[70,84,99],{"@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/aqa-gcse-combined-science-chemistry-higher-november-2021-paper-2h-exam-questions/207397/",{"url":83,"name":65,"@type":85,"author":86,"headline":65,"publisher":89,"fileFormat":92,"inLanguage":63,"description":67,"dateModified":93,"datePublished":93,"encodingFormat":92,"isAccessibleForFree":94,"interactionStatistic":95},"DigitalDocument",{"name":87,"@type":88},"Ivy","Person",{"url":74,"name":90,"@type":91},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":96,"interactionType":97,"userInteractionCount":4},"InteractionCounter",{"@type":98},"ViewAction",{"@type":100,"mainEntity":101},"FAQPage",[102,108,112],{"name":103,"@type":104,"acceptedAnswer":105},"What are the independent variable and one control variable in the magnesium and hydrochloric acid investigation?","Question",{"text":106,"@type":107},"The independent variable is the concentration of hydrochloric acid. One control variable is to keep the magnesium amount the same (for example, use the same piece/mass of magnesium).","Answer",{"name":109,"@type":104,"acceptedAnswer":110},"How do temperature changes affect the rate of the reaction?",{"text":111,"@type":107},"Increasing temperature increases the rate by increasing particle collisions, leading to more particles with enough energy to react.",{"name":113,"@type":104,"acceptedAnswer":114},"How can copper sulfate be used to test for the presence of water?",{"text":115,"@type":107},"Copper sulfate can be used as a water test based on the change it undergoes when water is present, indicating the presence of water in the sample.","https://schema.org",{"og:url":83,"og:type":118,"og:title":65,"og:site_name":90,"og:description":67},"article",{"robots":120,"canonical":83},"index,follow",{"doc_id":122,"site_id":62},207397,1788599396,{"code":4,"msg":5,"data":125},{"doc_id":122,"user_id":126,"nickname":87,"user_avatar":127,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":128,"file_id":129,"file_url":130,"file_type":131,"file_size":132,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":133,"language":134,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":135,"faqs":136,"seo_title":137,"seo_description":67,"update_tm":123,"read_time":138},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","| Please write clearly in block capitals. |  |  |  |\n| --- | --- | --- | --- |\n| Centre number |  | Candidate number |  |\n| Surname  \u003Cbr>Forename(s)  \u003Cbr>Candidate signature  \u003Cbr>I declare this is my own work. |  |  |  |\n\nGCSE  \nCOMBINED SCIENCE: TRILOGY  \nHigher Tier  \nChemistry Paper 2H  \nH  \nTime allowed: 1 hour 15 minutes  \nMaterials  \nFor this paper you must have:  \n• a ruler  \n• a scientific calculator  \n• the periodic table (enclosed) .  \nInstructions  \n• Use black ink or black ball-point pen.  \n• Pencil should only be used for drawing.  \n• Fill in the boxes at the top of this page.  \n• Answer all questions in the spaces provided.  \n• 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) .  \n• Do all rough work in this book. Cross through any work you do not want to be marked.  \n• In all calculations, show clearly how you work out your answer.  \n\n| For Examiner’s Use |  |\n| --- | --- |\n| Question | Mark |\n| 1 |  |\n| 2 |  |\n| 3 |  |\n| 4 |  |\n| 5 |  |\n| 6 |  |\n| TOTAL |  |\n\nInformation  \n• The maximum mark for this paper is 70.  \n• The marks for questions are shown in brackets.  \n• You are expected to use a calculator where appropriate.  \n• You are reminded of the need for good English and clear presentation in your answers.  \n*jun218464c2h01*  \nIB/M/Jun21/E7  \n8464/C/2H  \n2  \nThere are no questions printed on this page  \nDO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED  \n*02*  \nIB/M/Jun21/8464/C/2H  \nDo not write outside the box  \n3  \n0  1  A student investigated the reaction between magnesium and  \nexcess hydrochloric acid.  \nFigure 1 shows the apparatus.  \nFigure 1  \nThis is the method used.  \n1. Pour 50 cm3 of hydrochloric acid into a conical flask.  \n2. Add a piece of magnesium.  \n3. Insert stopper and delivery tube and start a timer.  \n4. Collect the gas produced in a gas syringe.  \n5. Record the volume of gas produced every 20 seconds for 2 minutes.  \n6. Repeat steps 1 to 5 with higher concentrations of hydrochloric acid.  \n0  1 . 1 Give the independent variable and one control variable in this investigation.  \n[2 marks]  \nIndependent variable   Control variable    \nQuestion 1 continues on the next page  \n*03*  \nTurn over ►  \nIB/M/Jun21/8464/C/2H  \n4  \nTable 1 shows the results from the first experiment using hydrochloric acid with a low concentration.  \nTable 1  \n\n| Time in seconds | 0 | 20 | 40 | 60 | 80 | 100 | 120 |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| Volume of gas in cm3 | 0 | 48 | 72 | 90 | 97 | 98 | 98 |\n\n0  1 . 2 Complete Figure 2.  \nYou should:  \n• plot the data from Table 1 (the point 0,0 has been plotted for you)  \n• draw a line of best fit.  \n[3 marks]  \nFigure 2  \n*04* IB/M/Jun21/8464/C/2H  \nDo not write outside the box  \n5  \n\n| 0 | 1 | . | 3 |\n| --- | --- | --- | --- |\n\nHow does the rate of this reaction change with time?  \nUse Table 1.  \n[1 mark]  \nTick (􀀹) one box.  \nThe rate decreases.  The rate stays the same.  The rate increases.   \nThe student repeated the experiment using hydrochloric acid with a higher concentration.  \nWhich statement is correct?  \n[1 mark]  \nTick (􀀹) one box.  \nThe activation energy for the reaction was higher.  The magnesium reacted more quickly.   \nThe reaction finished at the same time.   \nThe total volume of gas collected was smaller.   \n\n| 0 | 1 | . | 4 |\n| --- | --- | --- | --- |\n\nQuestion 1 continues on the next page  \n*05*  \nTurn over ►  \nIB/M/Jun21/8464/C/2H  \nDo not write outside the box  \n6  \n\n|  |  |  |  |  | Temperature also affects the rate of the reaction. | Do not\u003Cbr>outside box |\n| --- | --- | --- | --- | --- | --- | --- |\n|  | 0 | 1 | . | 5 |  |  |\n| Explain how increasing the temperature affects the rate of the reaction.\u003Cbr>You should refer to particles and collisions.\u003Cbr>[3 marks]\u003Cbr> |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |\n|  |  |  |  |  |  | 10 |\n|  |  |  |  |  |  |  |\n\nwrite the  \n*06* IB/M/Jun21/8464/C/2H  \n7  \n\n| 0 2\u003Cbr>0 2\u003Cbr>0 2 | Crude oil ","cbCaitTO2HJxZ02p","https://ap.wps.com/l/cbCaitTO2HJxZ02p","pdf",353096,28,"English","# Question 1: Magnesium + hydrochloric acid investigation\n## Independent and control variables\n## Plotting data and line of best fit\n## Rate change over time and concentration effect\n## Effect of temperature (particles and collisions)\n\n# Question 2: Crude oil, alkanes and properties\n## Decomposition producing crude oil\n## Identify an alkane with three carbon atoms\n## Compare methane and hexane\n## Cracking decane equation\n## Test for alkenes\n\n# Question 3: Potable water testing\n## Copper sulfate test for water\n## Definition of a pure substance","[{\"question\":\"What are the independent variable and one control variable in the magnesium and hydrochloric acid investigation?\",\"answer\":\"The independent variable is the concentration of hydrochloric acid. One control variable is to keep the magnesium amount the same (for example, use the same piece/mass of magnesium).\"},{\"question\":\"How do temperature changes affect the rate of the reaction?\",\"answer\":\"Increasing temperature increases the rate by increasing particle collisions, leading to more particles with enough energy to react.\"},{\"question\":\"How can copper sulfate be used to test for the presence of water?\",\"answer\":\"Copper sulfate can be used as a water test based on the change it undergoes when water is present, indicating the presence of water in the sample.\"}]","AQA GCSE Combined Science Chemistry Higher - November 2021 Paper 2H - Exam questions | PDF",71]