# Technical Sciences Grade 12 P2 Gauteng Mock 2021 Memo (Afr) > Grade 12 Technical Sciences Paper 2 memorandum from the Gauteng Mock Exam 2021 (Afrikaans), 6 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/gr12-technical-sciences-p2-english-and-afrikaans-2021-preparatory-possible-answers/615b9e69-8efb-48b4-a357-d0f6b46a469f - Updated: 2026-09-27 - Subject: Technical Sciences - Grade: Grade 12 - Language: Afrikaans - Document type: Memorandum - Year: 2021 - Exam period: Gauteng Mock Exam - Paper: 2 - Curriculum: CAPS - Pages: 6 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Technical Sciences](https://www.hlayiso.com/library/grade-12/technical-sciences) › [Technical Sciences Grade 12 P2 Gauteng Mock 2021 Memo (Afr)](https://www.hlayiso.com/library/gr12-technical-sciences-p2-english-and-afrikaans-2021-preparatory-possible-answers/615b9e69-8efb-48b4-a357-d0f6b46a469f) ## About this document Technical Sciences · Grade 12 · Gauteng Mock Exam · 2021 · Afrikaans. Memorandum, 6 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## Matching paper and memo - [Gr12 Technical Sciences P2 (Afrikaans) 2021 Preparatory Question Paper](https://www.hlayiso.com/library/gr12-technical-sciences-p2-afrikaans-2021-preparatory-question-paper/b8d52384-7857-495c-a182-6450e3423ff0) — QP · 2021 · Afr ## Document text Text extracted from the PDF. Layout, diagrams and tables may not survive extraction. ### Page 1 Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION/ GAUTENGSE DEPARTEMENT VAN ONDERWYS PREPARATORY EXAMINATION/ VOORBEREIDENDE EKSAMEN 2021 MARKING GUIDELINES/NASIENRIGLYNE 11102 TECHNICAL SCIENCES/TEGNIESE WETENSKAPPE (PAPER/VRAESTEL 2) 6 pages/bladsye 1 ### Page 2 Downloaded from hlayiso.com 11102/21 QUESTION/VRAAG 1 1.1 C (2) 1.2 A (2) 1.3 A (2) 1.4 C (2) 1.5 C (2) 1.6 C (2) [12] 2 ### Page 3 Downloaded from hlayiso.com 11102/21 QUESTION/VRAAG 2 2.1 A series of organic compounds that can be described by the same general formula and where each member differs from the next by CH2 group. / 'n Reeks organiese verbindings wat deur dieselfde algemene formule beskryf word en waarin die een lid van die volgende verskil met 'n CH2-groep. (2) 2.2.1 E (1) 2.2.2 A (1) 2.2.3 A (1) 2.2.4 F (1) 2.2.5 A OR/OF D (1) 2.3.1 H H H H H Criteria for marking/ Nasienkriteria  Double bond on correct position/ H C C C C C H Dubbelband op die regte posisie. H H H  5 carbon & 10 H atoms/5 koolstof- en 10 H-atome. (3) 2.3.2 H Criteria for marking/ Nasienkriteria H C H  6 carbon and 12 hydrogen atoms/ H H H H H 6 koolstof- en 12 waterstofatome H C C C C C C H  Correct side chains on the right H H H H H positions/Korrekte sykettings op die H C H regte posisies H (3) 2.4.1 Carbonyl (group) /Karboniel (groep) (1) 2.4.2 Propan-2-ol OR 2-propanol/Propaan-2-ol OF 2-propanol (2) [16] 3 ### Page 4 Downloaded from hlayiso.com 11102/21 QUESTION/VRAAG 3 3.1 High energy of combustion./Combustion releases huge amounts of energy./ Highly exothermic. /Hoë verbrandingsenergie./Verbranding stel groot (2) hoeveelhede energie vry./Baie eksotermies. 3.2 Marking criteria/ Nasienkriteria  Appropriate scale on both Boiling points (°C)/Kookpunte (°C) axes/Toepaslike skaal op beide asse  Both axes labelled correctly/Beide asse is korrek gemerk  Line/curve of best fit drawn through the Number of carbon atoms/Aantal koolstofatome points/Lyn/kurwe van beste pas deur die punte getrek (4) 3.3 Boiling point increases with number of carbon atoms. /Kookpunt neem toe (2) met die aantal koolstofatome. 3.4 Van der Waals forces between alcohol molecules increase with increase in molecular size. /Van der Waals-kragte tussen alkoholmolekules neem toe (2) met toename in molekulêre grootte. 3.5 Hydrogen bonds between alcohol molecules are stronger than Van der Waals forces between molecules of alkanes. /Waterstofbindings tussen alkoholmolekules is sterker as Van der Waals-kragte tussen molekules van (2) alkane. 3.6 Petrol has a low boiling point, vaporises easily/is volatile/explosive/flammable/ easily combustible/vapours have a higher density than oxygen and when swallowed vapours can cause suffocation. /Petrol het 'n lae kookpunt, verdamp maklik/is vlugtig/plofbaar/vlambaar/maklik brandbaar/dampe het 'n hoër digtheid as suurstof en dampe kan verswelg indien dit ingesluk word. (2) [14] 4 ### Page 5 Downloaded from hlayiso.com 11102/21 QUESTION/VRAAG 4 4.1 Addition/Addisie (1) 4.2 H H H H H H Marking criteria/ Nasienkriteria H H H C C C +  H C C C H O  Correct structural formula of H H H O H reactants/Korrekte H struktuurformule van reaktante Note: If condensed formula used: -1  Correct structural formula of product/Korrekte mark/Opmerking: Indien struktuurformule van produk gekondenseerde formule gebruik word: -1 punt (3) 4.3 H2O (1) 4.4.1 H H H Marking Criteria/Nasienkriteria  Br atom on carbon number 2 / H C C C H Br-atoom op koolstofgetal 2 H Br H (1) 4.4.2 Substitution /Substitusie (1) 4.5.1 Addition /Addisie (1) 4.5.2 Substitution /Substitusie (1) 4.5.3 The reaction takes place in the presence of an inert solvent/Die reaksie vind plaas in die teenwoordigheid van 'n inerte oplosmiddel (1) [10] 5 ### Page 6 Downloaded from hlayiso.com 11102/21 QUESTION/VRAAG 5 5.1 Concentration/Konsentrasie = 1mol∙dm-3 Temperature/Temperatuur = 298 K/25 °C (2) 5.2 Zn to/na Cu (1) 5.3 From chemical to electrical energy / Van chemise tot elektriese energie (2) 5.4 It completes the circuit or It maintains electrical neutrality in the electrolytes (Accept any one.)/Dit voltooi die stroombaan of Dit handhaaf elektriese neutraliteit in die elektroliete (Aanvaar enige een.) (1) 5.5 A substance that is oxidised/loses electrons OR a substance that undergoes oxidation/ ʼn Stof wat geoksideer word/verlies aan elektrone OF ʼn stof wat oksidasie ondergaan 5.6 Zn → Zn2++ 2e- (2) 5.7 Cu2+ + 2e-→ Cu (2) 5.8 Zn + Cu2+ → Zn2++ Cu balanced reaction equation/ gebalanseerde reaksievergelyking  (3) 5.9 Anode: Zinc electrode/Sinkelektrode OR/OF Zn(s) Cathode/Katode: copper electrode/koper electrode OR/OF Cu(s) (2) 5.10 Zn/Zn2+//Cu2+/Cu ( for //) (3) 5.11 Ecell/sel = Ecathode/katode – Eanode/anode Ecell/sel = 0,34 – (–0,76)  Ecell/sel = 1,1 V  (3) [23] TOTAL/TOTAAL: 75 6 ## Related documents - [Gr12 Technical Sciences P1 (Afrikaans) 2021 Preparatory Possible Answers](https://www.hlayiso.com/library/gr12-technical-sciences-p1-afrikaans-2021-preparatory-possible-answers/6caf3df6-69dd-4822-a42a-57288f67046c) — Technical Sciences · Memo · 2021 · Afr - [Tech Sciences P2 Memo June2021 English-Afrikaans](https://www.hlayiso.com/library/tech-sciences-p2-memo-june2021-english-afrikaans/4b19449f-7e71-42a8-982a-e33c25a32597) — Technical Sciences · Memo · 2021 · Afr - [Tech SC P2 (Afrikaans) X10 2019 Preparatory Examination Question Paper](https://www.hlayiso.com/library/tech-sc-p2-afrikaans-x10-2019-preparatory-examination-question-paper/5990a000-e97b-4403-abaf-73b0a269a563) — Technical Sciences · QP · 2019 · Afr - [Technical Sciences P1 Memo June 2021 Engl Afrikaans](https://www.hlayiso.com/library/technical-sciences-p1-memo-june-2021-engl-afrikaans/bbcfcb87-c63b-4949-b0e2-4701ef3f022f) — Technical Sciences · Memo · 2021 · Afr - [Tech SC P1 (Afrikaans) 2019 Preparatory Examination Possible Answers](https://www.hlayiso.com/library/tech-sc-p1-afrikaans-2019-preparatory-examination-possible-answers/ba49f240-e57d-4587-9498-a5d6317c8811) — Technical Sciences · Memo · 2019 · Afr - [Tech SC P1 (Afrikaans) X05 2019 Preparatory Examination Question Paper](https://www.hlayiso.com/library/tech-sc-p1-afrikaans-x05-2019-preparatory-examination-question-paper/0a7179a7-37d6-485a-9e0d-e0cbf3c0e08a) — Technical Sciences · QP · 2019 · Afr ## More from Grade 12 Technical Sciences - [Gr 12 Tech Sci ATP 2023-24](https://www.hlayiso.com/library/gr-12-tech-sci-atp-2023-24/a7a03e64-2e18-4f50-a7fa-6eb1a25136c7) — ATP - [TECH SCIENCES P1 QP GR12 SEPT 2025 ENG watermark](https://www.hlayiso.com/library/tech-sciences-p1-qp-gr12-sept-2025-eng-watermark/27b1584e-b5e6-4d62-a347-46bc297ca3cc) — QP · 2025 · Eng - [Technical Sciences P2 (Afrikaans) June 2025 Question Paper](https://www.hlayiso.com/library/technical-sciences-p2-afrikaans-june-2025-question-paper/d058d4d6-1a04-4407-8a1c-9187d5e524ea) — QP · 2025 · Afr - [Tech Science P1 AE](https://www.hlayiso.com/library/grade-12-technical-sciences-2025-nsc-june-exam-question-paper-paper-1/ef24e6dd-657f-4912-aaeb-29f50165041c) — QP · 2025 - [TECH SCIENCES P2 QP GR12 Jct 2025 AFR D](https://www.hlayiso.com/library/grade-12-technical-sciences-2025-nsc-june-exam-question-paper-paper-2-afrikaans/91dfe6a0-c88b-4061-af64-ecad65f1a790) — QP · 2025 · Afr - [NW 12 TECH SCI P2 QP AFR JUNE 2025](https://www.hlayiso.com/library/grade-12-technical-sciences-2025-nw-june-exam-question-paper-paper-2-afrikaans/668ae898-9378-451a-b548-5236f3ca7566) — QP · 2025 · Afr ## Collection - [Grade 12 past papers](https://www.hlayiso.com/grade-12/past-papers) --- Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. 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