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The document provides instructions on answering seven questions within 1½ hours for a total of 70 marks, including rounding to at least two decimals and showing all formulae and substitutions. Topics cover kinetic molecular theory, heating curves, electron configurations and bonding, empirical formula determination, balancing chemical equations, conservation of mass, and stoichiometric calculations using moles.",{"@graph":69,"@context":122},[70,84,105],{"@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/physical-sciences-chemistry-paper-2-provincial-examination-november-2020-grade-10/459207/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/physical-sciences-chemistry-paper-2-provincial-examination-november-2020-grade-10/459207.png","ImageObject",300,407,{"name":92,"@type":93},"PakDamar76","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-11","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How should answers be recorded for the multiple choice questions in Question 1?","Question",{"text":112,"@type":113},"Choose the correct option and write only the letter (A–D) next to the question numbers (1.1 to 1.5) in the answer book.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is required for final numerical answers?",{"text":117,"@type":113},"Round off final numerical answers to a minimum of two decimal places and show all formulae and substitutions in all calculations.",{"name":119,"@type":110,"acceptedAnswer":120},"How is the mass conserved in reaction E checked?",{"text":121,"@type":113},"By calculating and showing that the total mass of reactants equals the total mass of products for the reaction E: 2NaBr(aq) + Cl2(g) → 2NaCl(aq) + Br2(ℓ).","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},459207,1790811553,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},962090893057,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","GAUTENG DEPARTMENT OF EDUCATION  \nPROVINCIAL EXAMINATION  \nNOVEMBER 2020  \nGRADE 10  \n\n|  |  |  |\n| --- | --- | --- |\n|  | PHYSICAL SCIENCES (CHEMISTRY) PAPER 2 |  |\n|  |  |  |\n\nTIME: 1½ hours  \nMARKS: 70  \n7 pages, 1 data sheet and 1 periodic table  \nINSTRUCTIONS AND INFORMATION  \n1. Write your name on the ANSWER SHEET.  \n2. This question paper consists of SEVEN questions. Answer ALL the questions in the ANSWER BOOK.  \n3. Number the answers correctly according to the numbering system used in this question paper.  \n4. You may use a non-programmable calculator.  \n5. You may use appropriate mathematical instruments.  \n6. You are advised to use the attached DATA SHEETS.  \n7. Show ALL formulae and substitutions in ALL calculations.  \n8. Round off your FINAL numerical answers to a minimum of TWO decimal places.  \n9. Give brief motivations, discussions, et cetera where required.  \n10. Write neatly and legibly.  \nQUESTION 1: MULTIPLE CHOICE QUESTIONS  \nVarious options have been provided as possible answers to the following questions. Choose the answer and write only the letter (A – D) next to the question numbers (1 .1 to 1.5) in the ANSWER BOOK, e.g. 1.6 D.  \n1.1 Air can be classified as a/an    \nA homogeneous mixture.  \nB element.  \nC heterogeneous mixture.  \nD compound. (2)  \n1.2 According to the Kinetic Molecular Theory the particles of a solid ...  \nA vibrate in their fixed positions and have a fixed shape.  \nB are free to move and are compressible.  \nC are free to move and have a fixed shape.  \nD vibrate in their fixed positions and are compressible. (2)  \n1.3 Which one of the following electron configuration notations represent an ion of a halogen?  \nA 1s2 2s2 2p6 3s2 ~~ ~~  \nB 1s2 2s2 2p6 3s2 3p6  \nC s2 2s2 2p6 3s2 3p5  \nD 1s2 2s2 2p6 3s2 3p 1 (2)  \n1.4 There are   atoms of hydrogen in 2 moles of NH3.  \nA 5 x 1023  \nB 3,1 x 1023  \nC 3,61 x 1024  \nD 4 x 1023 (2)  \n1.5 The percentage hydrogen in C2 H4 is    \nA 4 % .  \nB 85, 71 % .  \nC 66,67 % .  \nD 14,29 % . (2)  \n[10]  \nQUESTION 2  \n2.1 The heating curve of a substance is shown below.  \nTemperature  \nTime (minutes)  \n2.1.1 Write down the physical state of the substance at t = 15 minutes. (1)  \n2.1.2 What is the boiling point of any substance? (2)  \n2.1.3 Give the value and unit of the freezing point for the substance in the graph. (2)  \n2.1.4 How will the average kinetic energy of the particles of this substance be affected between:  \n(a) t = 0 minutes and t = 5 minutes (1)  \n(b) t = 5 minutes and t = 10,5 minutes (1)(Write down only INCREASE, DECREASE or REMAINS THE SAME.)  \n2.1.5 Refer to the Kinetic Molecular Theory to fully explain the answer to QUESTION 2.1.4 (b) . (3)  \n[10]  \nQUESTION 3  \n3.1 Complete the table below. Write only the answer next to the question number (3 .1.1 – 3.1.5) .  \n\n| Element | Atomic\u003Cbr>number | Mass\u003Cbr>number | Number of\u003Cbr>protons | Number of\u003Cbr>neutrons | Number of\u003Cbr>electrons |\n| --- | --- | --- | --- | --- | --- |\n| Potassium | 19 | 39 | 3.1.1 | 3.1.2 | 3.1.3 |\n| Magnesium ion | 12 | 3.1.4 | 12 | 12 | 3.1.5 |\n\n(5)  \n3.2 Lithium occurs as two isotopes in nature. 7 % lithium-6 atom and 93 % lithium-7 atom.  \n3.2.1 Define the term isotopes. (2)  \n3.2.2 Calculate the relative atomic mass of lithium. (3)  \n[10]  \nQUESTION 4  \nMagnesium reacts with chlorine gas to form magnesium chloride.  \n4.1 Define the term ionic bond. (2)  \n4.2 Write down the chemical formula of magnesium chloride. (2)  \n4.3 For the chlorine atom:  \n4.3.1 Draw the Aufbau diagram. (3)  \n4.3.2 Write down the valence electrons. ( 1)  \n4.4 Write down the electron configuration notation (sp notation) of magnesium. (2)  \n4.5 Show the formation of magnesium chloride by using the Lewis dot diagrams. (4)  \n[14]  \nQUESTION 5  \nThe empirical formula of a certain compound needs to be determined.  \nThe compound has 62,5 % of Pb; 8,45 % of N and 29,05 % of O.  \n5.1 Define the term empirical formula. (2)  \n5.2 Determine the empirical formula of this compound. (6)  \n[8]  \nQUESTION 6  \nConsid","cbCaibmONHy8twXj","https://ap.wps.com/l/cbCaibmONHy8twXj","pdf",340778,"English","# Instructions and information\n# Question 1: Multiple choice questions\n# Question 2\n## Heating curve and kinetic molecular theory\n# Question 3\n## Atomic and subatomic particles; isotopes\n# Question 4\n## Ionic bonding and electron configurations\n# Question 5\n## Empirical formula calculation\n# Question 6\n## Balancing reactions and conservation of mass\n# Question 7\n## Stoichiometry with sodium carbonate and hydrochloric acid","[{\"question\":\"How should answers be recorded for the multiple choice questions in Question 1?\",\"answer\":\"Choose the correct option and write only the letter (A–D) next to the question numbers (1.1 to 1.5) in the answer book.\"},{\"question\":\"What is required for final numerical answers?\",\"answer\":\"Round off final numerical answers to a minimum of two decimal places and show all formulae and substitutions in all calculations.\"},{\"question\":\"How is the mass conserved in reaction E checked?\",\"answer\":\"By calculating and showing that the total mass of reactants equals the total mass of products for the reaction E: 2NaBr(aq) + Cl2(g) → 2NaCl(aq) + Br2(ℓ).\"}]","Physical Sciences (Chemistry) Paper 2 - Provincial Examination November 2020 Grade 10 | PDF",1790755455,23]