# Technical Sciences Grade 12 P2 Gauteng Mock 2019 QP (Eng) > Grade 12 Technical Sciences Paper 2 question paper from the Gauteng Mock Exam 2019 (English), 21 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/tech-sc-p2-english-x10-2019-preparatory-examination-question-paper/7cbf335b-4acc-4cfa-9017-65aa032b487c - Updated: 2026-09-27 - Subject: Technical Sciences - Grade: Grade 12 - Language: English - Document type: Question paper - Year: 2019 - Exam period: Gauteng Mock Exam - Paper: 2 - Curriculum: CAPS - Pages: 21 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 2019 QP (Eng)](https://www.hlayiso.com/library/tech-sc-p2-english-x10-2019-preparatory-examination-question-paper/7cbf335b-4acc-4cfa-9017-65aa032b487c) ## About this document Technical Sciences · Grade 12 · Gauteng Mock Exam · 2019 · English. Question paper, 21 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## 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 PREPARATORY EXAMINATION 2019 11102 TECHNICAL SCIENCES PAPER 2 TIME: 3 hours MARKS: 150 17 pages + 3 data sheets and 1 answer sheet P.T.O. ### Page 2 Downloaded from hlayiso.com TECHNICAL SCIENCES 2 (Paper 2) 11102/19 GAUTENG DEPARTMENT OF EDUCATION PREPARATORY EXAMINATION – 2019 TECHNICAL SCIENCES (Paper 2) TIME: 3 hours MARKS: 150 INSTRUCTIONS AND INFORMATION 1. This question paper consists of NINE questions. Answer ALL the questions in the ANSWER BOOK. 2. Start EACH question on a NEW page in the ANSWER BOOK. 3. Number the answers correctly according to the numbering system used in this question paper. 4. Leave ONE line between two sub-questions, e.g. between Question 2.1 and Question 2.2. 5. You may use a non-programmable calculator. 6. You are advised to use the attached DATA SHEETS. 7. Round-off your FINAL numerical answers to a minimum of TWO decimal places. 8. Give brief motivations, discussions, etc. where required. 9. Write neatly and legibly. P.T.O. ### Page 3 Downloaded from hlayiso.com TECHNICAL SCIENCES 3 (Paper 2) 11102/19 QUESTION 1: (Start on a new page.) Various options are 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 – 1.10) in the ANSWER BOOK, e.g. 1.11 D. 1.1 Which of the following statements about the organic compound with the molecular formula C3H6O is correct? A It is a carboxylic acid. B It is an ester. C It is an alkane. D It is an alcohol. (2) 1.2 Which of the following reaction types can be used to prepare CHLOROETHANE from ETHANE? A Addition B Combustion C Substitution D Reduction (2) 1.3 Carboxylic acids have stronger intermolecular forces than alcohols. What is the possible reason for this? A Caboxylic acids have two sides hydrogen bonds and alcohols have one. B Carboxylic acids have larger molecular formulae than alcohols. C Carboxylic acids dissolve better in water than in alcohols. D Carboxylic acids have lower boiling points than alcohols. (2) P.T.O. ### Page 4 Downloaded from hlayiso.com TECHNICAL SCIENCES 4 (Paper 2) 11102/19 1.4 During the hydrogenation reactions of alkenes, … A single bonds are broken and alcohols are formed. B double bonds are broken and haloalkanes are formed. C double bonds are broken and alkynes are formed. D double bonds are broken and alkanes are formed. (2) 1.5 An oxidising agent is a substance that … A gains electrons. B loses electrons. C gains protons. D loses protons. (2) 1.6 In a standard Cu-Zn electrochemical cell, the electrolyte at the anode consists of a … A 1,0 mol.dm-3 solution of Cu2+ ions. B 1,0 mol.dm-3 solution of Zn2+ ions. C 1,0 mol.dm-3 solution of Mg2+ ions. D 1,0 mol.dm-3 solution of Fe2+ ions. (2) 1.7 When a ray of light enters a glass block obliquely, its direction changes. This phenomenon is known as ... A diffraction. B dispersion. C refraction. D reflection. (2) P.T.O. ### Page 5 Downloaded from hlayiso.com TECHNICAL SCIENCES 5 (Paper 2) 11102/19 1.8 During the dispersion of white light through a triangular prism, which of the following colours will not be observed? A Violet light B Red light C White light D Indigo light (2) 1.9 Which of the conditions below can be corrected by a convex lens? A Dyslexia B Watery eyes C Short-sightedness D Far-sightedness (2) 1.10 What will be observed when an object is placed at the focal point F and light passes through a convex lens? A A bigger inverted image will form on the other side of the lens. B A smaller inverted image will form on the other side of the lens. C An upright bigger image will be formed on the same side as the object. D No image will be formed. (2) [20] P.T.O. ### Page 6 Downloaded from hlayiso.com TECHNICAL SCIENCES 6 (Paper 2) 11102/19 QUESTION 2 (Start on a new page.) Consider the organic compounds represented by the letters A – H, given in the table below. H H H A C3H7C B H C C C C H H H H H H O H C C3H8 D H C C C O C H H H H H H H H E H C C C C H F C4H10 H H O H H H H H O H H G H C C C C O H H H C C C H H H H H H C H H P.T.O. ### Page 7 Downloaded from hlayiso.com TECHNICAL SCIENCES 7 (Paper 2) 11102/19 2.1 Define the term homologous series. (2) 2.2 Write down the NAMES of the homologous series to which the following compounds belong: 2.2.1 B (1) 2.2.2 D (1) 2.2.3 C (1) 2.3 Write the NAME of the functional group to which the following compounds belong: 2.3.1 E (1) 2.3.2 G (1) 2.4 Write down the IUPAC names of the following compounds: 2.4.1 A (2) 2.4.2 E (2) 2.4.3 H (2) 2.5 Write down ALL letters that represent organic molecules which are hydrocarbons. (4) 2.6 Write down the letters that represent TWO pairs of isomers. (2) 2.7 Write down the structural formula of compound F. (2) 2.8 Write down the structural formula of the functional group of compound G. (2) [23] P.T.O. ### Page 8 Downloaded from hlayiso.com TECHNICAL SCIENCES 8 (Paper 2) 11102/19 QUESTION 3 (Start on a new page.) South Africa imports crude oil. Crude oil can be separated into a more useable fraction of hydrocarbons at different boiling points by fractional distillation as demonstrated in the diagram below. Refinery Gas [Source: http://www.quora.com] 3.1 Define the term boiling point. (2) 3.2 Study the diagram above to answer questions that follow. 3.2.1 Which of the organic molecules between butane and hexane will have a higher boiling point? (1) 3.2.2 Explain your answer to Question 3.2.1 by referring to MOLECULAR MASS, STRENGTH OF INTERMOLECULAR FORCES and ENERGY. (3) 3.2.3 Which of the organic molecules between methane and pentane will have a higher vapour pressure? (1) 3.2.4 Explain your answer to Question 3.2.3 by referring to the boiling point. (2) [9] P.T.O. ### Page 9 Downloaded from hlayiso.com TECHNICAL SCIENCES 9 (Paper 2) 11102/19 QUESTION 4 (Start on a new page.) The flow diagram below shows the reactions of saturated and unsaturated hydrocarbons. Use the diagram to answer the questions that follow. 4.1 Distinguish between saturated and unsaturated hydrocarbons. (2) 4.2 Write down the NAMES of ... 4.2.1 reaction 1. (1) 4.2.2 reaction 2. (1) 4.2.3 reaction 3. (1) P.T.O. ### Page 10 Downloaded from hlayiso.com TECHNICAL SCIENCES 10 (Paper 2) 11102/19 4.3 Write down ... 4.3.1 ONE reaction condition for reaction 2. (1) 4.3.2 TWO reaction conditions for reaction 3. (2) 4.4 Compound A is used in cigarette lighters. It can react with excess oxygen. Write down a balanced chemical equation to show the reaction of compound A with excess oxygen. (3) 4.5 Write down the NAME of the monomer that forms polyethene. (1) 4. 6 Write down TWO industrial uses of polyethene. (2) [14] P.T.O. ### Page 11 Downloaded from hlayiso.com TECHNICAL SCIENCES 11 (Paper 2) 11102/19 QUESTION 5 (Start on a new page.) The diagram below represents an electrochemical cell which demonstrates electrolysis. 5.1 Define the term electrolysis. (2) 5.2 Which energy conversion takes place in this cell? (2) 5.3 Which electrode (A or B) is the cathode? (1) 5.4 Write down the NAME and the FORMULA of the product formed at electrode A. (2) 5.5 Write down the FORMULA of the CATIONS and ANIONS present in the copper chloride solution. (2) 5.6 Write down the NAME of the substance that will be formed at electrode B, when the cell has been in operation for some time? (1) 5.7 Biodiesel and petroleum diesel are alternative sources of energy. 5.7.1 Write down TWO environmental advantages of using biodiesel instead of petroleum diesel. (2) 5.7.2 Write down TWO other types of alternative energy that are used in South Africa. (2) [14] P.T.O. ### Page 12 Downloaded from hlayiso.com TECHNICAL SCIENCES 12 (Paper 2) 11102/19 QUESTION 6 (Start on a new page.) The diagram below represents a Zn-Cu galvanic cell. 6.1 Define the term galvanic cell. (2) 6.2 Use the diagram of the Zn-Cu galvanic cell to answer the questions that follow. 6.2.1 Write down the NAME of electrode A. (1) 6.2.2 Which electrolyte is represented by letter B? (1) 6.2.3 What is the name of component C, represented by a u-tube? (1) 6.2 4 What will be the reading on the voltmeter if component C is removed? (1) 6.2.5 Explain your answer to Question 6.2.4. (2) 6.2.6 Write the FORMULA of the solution that can be used in component C. (1) 6.2.7 In which direction do the electrons travel in the external circuit? Write down only from D to E / from E to D. (1) 6.3 Write down an equation for the oxidation half-reaction when the cell produces a current. (2) 6.4 Write down the standard conditions for the galvanic cell in the diagram above. (2) P.T.O. ### Page 13 Downloaded from hlayiso.com TECHNICAL SCIENCES 13 (Paper 2) 11102/19 6.5 Refer to the galvanic cell in the diagram above. 6.5.1 Identify the electrode or electrolyte which is a reducing agent. (1) 6.5.2 Write down the cell notation. Indicate the phases of electrodes and concentration of electrolytes. (4) 6.5.3 Use the Table of Standard Reduction Potentials (at the end of the question paper) to calculate the emf of the cell. (4) 6.6 When the reaction starts, electrolyte B is blue in colour. What observation will be made about electrolyte B after the cell has been in operation for some time? (1) [24] P.T.O. ### Page 14 Downloaded from hlayiso.com TECHNICAL SCIENCES 14 (Paper 2) 11102/19 QUESTION 7 (Start on the new page.) The diagram below represents an incomplete refraction pattern of a light ray from air into a rectangular glass block. 7.1 Define the term refraction. (2) 7.2 Use the ANSWER SHEET provided to complete the ray diagram above to show the path of the missing rays. (2) 7.3 A ray of light is now observed from the glass block to air as shown in the diagram below. P.T.O. ### Page 15 Downloaded from hlayiso.com TECHNICAL SCIENCES 15 (Paper 2) 11102/19 7.3.1 Define the term critical angle. (2) 7.3.2 Draw a labelled ray diagram to show what will happen to the ray if the incident angle in the glass block is increased to 45°. Label all rays and show the MAGNITUDE of all angles inside the glass block. (4) 7.3.3 Which phenomenon is represented by the diagram you have drawn at Question 7.3.2. (1) 7.3.4 Define the phenomenon named in Question 7.3.3. (2) 7.3.5 Write down ONE application of total internal reflecting prisms. (1) 7.3.6 Write down TWO conditions associated with the phenomenon in Question 7.3.3. (2) [16] P.T.O. ### Page 16 Downloaded from hlayiso.com TECHNICAL SCIENCES 16 (Paper 2) 11102/19 QUESTION 8 (Start on the new page.) The diagram below shows a lens and an object placed on an optical bench. 8.1 What type of a lens is used in the diagram above? (1) 8.2 Using the ANSWER SHEET provided, draw a ray diagram to show the image of the object. (4) 8.3 Write down TWO properties of the image that is formed. (2) 8.4 The lens in the diagram above is replaced with another TYPE of lens and the object is now placed between F and 2F. 8.4.1 Draw a ray diagram to show the position and the size of the image that is formed. (4) 8.4.2 Write down TWO properties of the image that will be formed by the lens in Question 8.4.1. (2) 8.4.3 Which eye condition can be corrected by the lens in Question 8.4.1? (1) [14] P.T.O. ### Page 17 Downloaded from hlayiso.com TECHNICAL SCIENCES 17 (Paper 2) 11102/19 QUESTION 9 (Start on the new page.) 9.1 Define the term electromagnetic wave. (2) 9.2 Write down the SIX invisible electromagnetic waves in the order of increasing wavelength. (3) 9.3 From the list of electromagnetic waves in Question 9.2, write down the TYPE of electromagnetic wave that ... 9.3.1 can penetrate the flesh but not the bone, therefore displaying the shadow of the bone. (1) 9.3.2 is emitted by naturally radioactive elements and is a by-product of nuclear reactions. (1) 9.4 Give ONE advantage of ultraviolet light to human bodies. (1) 9.5 A detector is placed a certain distance away from a 1,0 x 1010 Hz radar signal. Calculate the wavelength of the radar signal. (4) 9.6 Calculate the energy of a photon of wavelength 600 nm. (4) [16] TOTAL: 150 END ### Page 18 Downloaded from hlayiso.com TECHNICAL SCIENCES 18 (Paper 2) 11102/19 DATA FOR TECHNICAL SCIENCES GRADE 12 PAPER 2 GEGEWENS VIR TEGNIESE WETENSKAPPE GRAAD 12 VRAESTEL 2 TABLE 1 / TABEL 1: PHYSICAL CONSTANTS / FISIESE KONSTANTES PHYSICAL CONSTANTS / FISIESE KONSTANTES CONSTANT / KONSTANTE SYMBOL / SIMBOOL VALUE / WAARDE Standard pressure 5 Standaarddruk pƟ 1,01 x 10 Pa Standard temperature 298 K/25 0C Standaard temperatuur TƟ Speed of light 8 Spoed van lig c 3 x 10 m.s-1 Planck's constant -34 Planck se konstante h 6,63 x 10 J.s TABLE 2 / TABEL 2: WAVES, SOUND AND LIGHT / GOLWE, KLANK EN LIG 1 𝑣𝑣 = 𝑓𝑓𝑓𝑓 T= 𝑓𝑓 𝑐𝑐 E = hf or / of E = h 𝜆𝜆 TABLE 3 / TABEL 3: ELECTROCHEMISTRY / ELEKTROCHEMIE Emf / Emk Eθcell = Eθcathode − Eθanode / E θsel = E katode θ − E θanode or/of E θcell = E reduction θ − E θoxidation / E θsel = E reduksie θ − E θoksidasie or/of θ θ θ E θcell = E oxidising θ θ agent − E reducing agent / E sel = E oksideermiddel − E reduseermiddel ### Page 19 Downloaded from hlayiso.com TECHNICAL SCIENCES 19 (Paper 2) 11102/19 TABLE 4A: STANDARD REDUCTION POTENTIALS TABEL 4A: STANDAARD-REDUKSIEPOTENSIALE θ Half-reactions/Halfreaksies E (V) − − F2(g) + 2e ⇌ 2F + 2,87 Co + e− 2+ 3+ ⇌ Co + 1,81 H2O2 + 2H +2e− ⇌ + 2H2O +1,77 − MnO 4 + 8H + 5e− 2+ + ⇌ Mn + 4H2O + 1,51 − − Cℓ2(g) + 2e ⇌ 2Cℓ + 1,36 2− Cr2O 7 + 14H + 6e− 3+ + ⇌ 2Cr + 7H2O + 1,33 − + O2(g) + 4H + 4e ⇌ 2H2O + 1,23 MnO2 + 4H + 2e− 2+ + ⇌ Mn + 2H2O + 1,23 Pt + 2e− ⇌ 2+ Pt + 1,20 Br2(ℓ) + 2e− ⇌ 2Br− + 1,07 NO 3− + 4H + 3e− + ⇌ NO(g) + 2H2O + 0,96 Hg + 2e− ⇌ Hg(ℓ) 2+ + 0,85 Increasing oxidising ability / Toenemende oksiderende vermoë Ag + e− ⇌ + Ag + 0,80 Increasing reducing ability / Toenemende reduserende vermoë NO 3 + 2H + e− − + ⇌ NO2(g) + H2O + 0,80 Fe + e− 2+ 3+ ⇌ Fe + 0,77 O2(g) + 2H + 2e− ⇌ + H2O2 + 0,68 I2 + 2e− ⇌ 2I− + 0,54 Cu + e− ⇌ + Cu + 0,52 SO2 + 4H + 4e− ⇌ + S + 2H2O + 0,45 2H2O + O2 + 4e− ⇌ 4OH− + 0,40 Cu + 2e− ⇌ 2+ Cu + 0,34 2− SO 4 + 4H + 2e− ⇌ + SO2(g) + 2H2O + 0,17 − + 2+ Cu + e ⇌ Cu + 0,16 Sn + 2e− 2+ 4+ ⇌ Sn + 0,15 S + 2H + 2e− ⇌ + H2S(g) + 0,14 2H + 2e− ⇌ + H2(g) 0,00 Fe + 3e− ⇌ − 0,06 3+ Fe Pb + 2e− ⇌ − 0,13 2+ Pb Sn + 2e− ⇌ − 0,14 2+ Sn Ni + 2e− ⇌ − 0,27 2+ Ni Co + 2e− ⇌ − 0,28 2+ Co Cd + 2e− ⇌ − 0,40 2+ Cd Cr + e− 2+ ⇌ − 0,41 3+ Cr Fe + 2e− ⇌ − 0,44 2+ Fe Cr + 3e− ⇌ − 0,74 3+ Cr Zn + 2e− ⇌ − 0,76 2+ Zn 2H2O + 2e− ⇌ H2(g) + 2OH− − 0,83 Cr + 2e− ⇌ − 0,91 2+ Cr Mn + 2e− ⇌ − 1,18 2+ Mn Aℓ + 3e− ⇌ Aℓ − 1,66 3+ Mg + 2e− ⇌ − 2,36 2+ Mg Na + e− ⇌ − 2,71 + Na Ca + 2e− ⇌ − 2,87 2+ Ca Sr + 2e− ⇌ − 2,89 2+ Sr Ba + 2e− ⇌ − 2,90 2+ Ba + - Cs + e ⇌ Cs - 2,92 − ⇌ − 2,93 + K +e K Li + e− ⇌ − 3,05 + Li ### Page 20 Downloaded from hlayiso.com TECHNICAL SCIENCES 20 (Paper 2) 11102/19 TABLE 4B: STANDARD REDUCTION POTENTIALS TABEL 4B: STANDAARD-REDUKSIEPOTENSIALE Half-reactions/Halfreaksies θ E (V) − ⇌ − 3,05 + Li + e Li K + e− ⇌ − 2,93 + K Cs + e− ⇌ − 2,92 + Cs Ba + 2e− ⇌ − 2,90 2+ Ba Increasing reducing ability/Toenemende reduserende vermoë Sr + 2e− ⇌ − 2,89 2+ Increasing oxidising ability/Toenemende oksiderende vermoë Sr Ca + 2e− ⇌ − 2,87 2+ Ca Na + e− ⇌ − 2,71 + Na Mg + 2e− ⇌ − 2,36 2+ Mg Aℓ + 3e− ⇌ Aℓ − 1,66 3+ Mn + 2e− ⇌ − 1,18 2+ Mn Cr + 2e− ⇌ − 0,91 2+ Cr 2H2O + 2e− ⇌ H2(g) + 2OH− − 0,83 Zn + 2e− ⇌ − 0,76 2+ Zn Cr + 3e− ⇌ − 0,74 3+ Cr Fe + 2e− ⇌ − 0,44 2+ Fe Cr + e− 2+ ⇌ − 0,41 3+ Cr Cd + 2e− ⇌ − 0,40 2+ Cd Co + 2e− ⇌ − 0,28 2+ Co Ni + 2e− ⇌ − 0,27 2+ Ni Sn + 2e− ⇌ − 0,14 2+ Sn Pb + 2e− ⇌ − 0,13 2+ Pb Fe + 3e− ⇌ − 0,06 3+ Fe 2H + 2e− ⇌ + H2(g) 0,00 S + 2H + 2e− ⇌ + H2S(g) + 0,14 Sn + 2e− 2+ 4+ ⇌ Sn + 0,15 Cu + e− + 2+ ⇌ Cu + 0,16 2− SO 4 + 4H + 2e− ⇌ + SO2(g) + 2H2O + 0,17 − 2+ Cu + 2e ⇌ Cu + 0,34 2H2O + O2 + 4e− ⇌ 4OH− + 0,40 SO2 + 4H + 4e− ⇌ + S + 2H2O + 0,45 Cu + e− ⇌ + Cu + 0,52 I2 + 2e− ⇌ 2I− + 0,54 O2(g) + 2H + 2e− ⇌ + H2O2 + 0,68 Fe + e− 2+ 3+ ⇌ Fe + 0,77 NO 3− + 2H + e− + ⇌ NO2(g) + H2O + 0,80 Ag + e− ⇌ + Ag + 0,80 Hg + 2e− ⇌ Hg(ℓ) 2+ + 0,85 NO 3− + 4H + 3e− + ⇌ NO(g) + 2H2O + 0,96 Br2(ℓ) + 2e− ⇌ 2Br− + 1,07 Pt + 2 e− ⇌ 2+ Pt + 1,20 MnO2 + 4H + 2e− 2+ + ⇌ Mn + 2H2O + 1,23 O2(g) + 4H + 4e− ⇌ + 2H2O + 1,23 2− Cr2O 7 + 14H + 6e− 3+ + ⇌ 2Cr + 7H2O + 1,33 − − Cℓ2(g) + 2e ⇌ 2Cℓ + 1,36 − MnO 4 + 8H + 5e− 2+ + ⇌ Mn + 4H2O + 1,51 − + H2O2 + 2H +2 e ⇌ 2H2O +1,77 Co + e− 2+ 3+ ⇌ Co + 1,81 F2(g) + 2e− ⇌ 2F− + 2,87 ### Page 21 Downloaded from hlayiso.com TECHNICAL SCIENCES 21 (Paper 2) 11102/19 ANSWER SHEET FOR QUESTION 7.2 AND QUESTION 8.2 Name of school Learner’s Name QUESTION 7.2 QUESTION 8.2 ## Related documents - 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