Technical Sciences Grade 12 P2 2026 QP (Eng)

Prediction hlayiso mock exams Practice Series: Grade 12 NSC Preparation WWW.HLAYISO.COM NATIONAL SENIOR CERTIFICATE GRADE 12 TECHNICAL SCIENCES P2 PREDICTION EXAMINATION 2026 MARKS: 75 TIME: 1½ hours This question paper consists of 9 pages and 4 data sheets. Copyright reserved Please turn over

Technical Sciences/P2 2 Hlayiso/Prediction 2026 NSC Prediction INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. 2. This question paper consists of SEVEN questions. Answer ALL the questions in the ANSWER BOOK. 3. Start EACH question on a NEW page in the ANSWER BOOK. 4. Number the answers correctly according to the numbering system used in this question paper. 5. Leave ONE line between two subquestions, e.g. between QUESTION 2.1 and QUESTION 2.2. 6. You may use a non-programmable calculator. 7. You are advised to use the attached DATA SHEETS. 8. Round off your FINAL numerical answers to a minimum of TWO decimal places. 9. Give brief motivations, discussions, etc. where required. 10. Write neatly and legibly. Copyright reserved Please turn over

Technical Sciences/P2 3 Hlayiso/Prediction 2026 NSC Prediction QUESTION 1: MULTIPLE-CHOICE QUESTIONS 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 to 1.5) in the ANSWER BOOK, e.g. 1.6 D. 1.1 Which ONE of the following compounds is a SECONDARY alcohol? A CH3 CH2 CH2 OH B CH3 CH(OH)CH3 C (CH3 )3 COH D CH3 OH (2) 1.2 Which ONE of the following is the STRONGEST oxidising agent under standard conditions? A Zn2+ B Cu2+ C Ag+ D Mg2+ (2) 1.3 The oxidation number of chromium (Cr) in the dichromate ion, Cr2 O2– 7 , is … A +6. B +7. C +12. D –2. (2) 1.4 A p-n junction diode is connected to a battery. The diode is FORWARD BIASED when … A the depletion region becomes wider. B the n-type side is connected to the positive terminal of the battery. C the p-type side is connected to the positive terminal of the battery. D the diode has a very high resistance. (2) 1.5 Which ONE of the following reactions will take place SPONTANEOUSLY under standard conditions? A Cu + Fe2+ → Cu2+ + Fe B Mg + Ni2+ → Mg2+ + Ni C 2Ag + Cu2+ → 2Ag+ + Cu D Pb + Zn2+ → Pb2+ + Zn (2) [10] Copyright reserved Please turn over

Technical Sciences/P2 4 Hlayiso/Prediction 2026 NSC Prediction QUESTION 2 (Start on a new page.) The letters A to F in the table below represent six organic compounds. H H H A CH3 CH(CH3 )CH(CH3 )CH2 CH3 B H C C C H H H H H O H H C D CH3 (CH2 )5 CH3 H C C C C O C C H H H H H H E Butanoic acid F CH3 COCH2 CH2 CH3 2.1 Write down the LETTER that represents a compound that: 2.1.1 Is a ketone (1) 2.1.2 Is an unsaturated hydrocarbon (1) 2.1.3 Is a CHAIN isomer of compound A (1) 2.2 Define the term chain isomers. (2) 2.3 Write down the IUPAC name of compound A. (2) 2.4 Write down the IUPAC name of compound C. (2) 2.5 Draw the STRUCTURAL FORMULA of compound F. (2) 2.6 Compound B is the monomer used to produce the plastic polypropene, which is used to make school chairs and crates. 2.6.1 Write down the TYPE of polymerisation reaction that produces polypropene. (1) 2.6.2 Write down the general formula of the homologous series to which compound B belongs. (1) [13] Copyright reserved Please turn over

Technical Sciences/P2 5 Hlayiso/Prediction 2026 NSC Prediction QUESTION 3 (Start on a new page.) Learners investigate the boiling points of four organic compounds, A to D, that have comparable molar masses. Their results are shown in the bar graph below. COMPOUND MOLAR MASS (g·mol–1 ) A Pentane 72 B Butanal 72 C Butan-1-ol 74 D Propanoic acid 74 160 141 140 118 Boiling point (◦ C) 120 100 80 75 60 40 36 20 0 A B C D Compound 3.1 Define the term boiling point. (2) 3.2 Write down the INDEPENDENT variable in this investigation. (1) 3.3 Which compound (A, B, C or D) has the HIGHEST vapour pressure at 25 °C? (1) 3.4 Explain the difference between the boiling points of compounds B and C by referring to the TYPE and STRENGTH of the intermolecular forces and the ENERGY needed. (3) 3.5 Compounds C and D both have hydrogen bonds between their molecules. Explain why compound D has the higher boiling point. (2) 3.6 Is compound A a LIQUID or a GAS at 40 °C? Use the graph to give a reason for the answer. (2) [11] Copyright reserved Please turn over

Technical Sciences/P2 6 Hlayiso/Prediction 2026 NSC Prediction QUESTION 4 (Start on a new page.) The flow diagram below shows a number of organic reactions. Compound A is but-2-ene. Compound C is the product of reaction 3 and is also one of the products of reaction 5. Compound A Reaction 1 Compound B but-2-ene H2 / catalyst butane 5 a c tion Reaction 3: HCℓ Re Reaction 2: excess O2 Cℓ 2 Compound C CO2 + H2 O a haloalkane Reaction 4: NaOH(aq) Compound D an alcohol 4.1 Write down the TYPE of reaction represented by: 4.1.1 Reaction 1 (1) 4.1.2 Reaction 3 (1) 4.1.3 Reaction 5 (1) 4.2 Write down the NAME or FORMULA of the catalyst needed in reaction 1. (1) 4.3 Write down the reaction condition needed for reaction 5. (1) 4.4 Write down the IUPAC name of compound C. (2) 4.5 Refer to reaction 4. 4.5.1 Besides a dilute base, write down ONE other reaction condition. (1) 4.5.2 Draw the STRUCTURAL FORMULA of compound D. (2) 4.6 Use MOLECULAR FORMULAE to write down a balanced chemical equation for reaction 2. (3) [13] Copyright reserved Please turn over

Technical Sciences/P2 7 Hlayiso/Prediction 2026 NSC Prediction QUESTION 5 (Start on a new page.) Pure silicon is a poor conductor of electricity at room temperature. Manufacturers of solar cells and diodes add very small amounts of other elements to silicon to improve its conductivity. 5.1 Define the term doping. (2) 5.2 A sample of silicon is doped with phosphorus (P). 5.2.1 Will an n-TYPE or a p-TYPE semiconductor be formed? (1) 5.2.2 Give a reason for the answer to QUESTION 5.2.1 by referring to the number of valence electrons of phosphorus. (1) 5.3 Write down the NAME of ONE element that can be added to silicon to produce a p-type semiconductor. (1) 5.4 Write down the MAJORITY charge carriers in a p-type semiconductor. (1) [6] Copyright reserved Please turn over

Technical Sciences/P2 8 Hlayiso/Prediction 2026 NSC Prediction QUESTION 6 (Start on a new page.) A workshop in Polokwane coats steel door brackets with copper. The simplified diagram below shows the cell that is used. The bracket and a bar of pure copper are placed in a copper(II) sulphate solution, CuSO4 (aq). DC source Steel bracket Copper bar CuSO4 (aq) 6.1 Define the term electrolysis. (2) 6.2 Is the reaction in this cell SPONTANEOUS or NON-SPONTANEOUS? Give a reason for the answer. (2) 6.3 Which electrode, the STEEL BRACKET or the COPPER BAR, must be connected to the NEGATIVE terminal of the DC source? (1) 6.4 Write down the half-reaction that takes place at the copper bar. (2) 6.5 How will the concentration of the Cu2+ (aq) ions in the solution change while the cell is in operation? Write down only INCREASES, DECREASES or REMAINS THE SAME. (1) 6.6 Hydrogen fuel cells are being considered as a replacement for diesel engines in city buses. 6.6.1 Write down the energy conversion that takes place in a fuel cell. (1) 6.6.2 State ONE environmental advantage of using hydrogen fuel cells instead of diesel engines. (1) [10] Copyright reserved Please turn over

Technical Sciences/P2 9 Hlayiso/Prediction 2026 NSC Prediction QUESTION 7 (Start on a new page.) The galvanic cell represented by the cell notation below is set up in a school laboratory. Zn(s) | Zn2+ (1 mol·dm–3 ) || Pb2+ (1 mol·dm–3 ) | Pb(s) V Y Zn Pb Zn2+ (aq) Pb2+ (aq) 7.1 Define the term galvanic cell. (2) 7.2 In which direction do electrons flow in the external circuit: from Zn to Pb OR from Pb to Zn? (1) 7.3 Write down ONE function of component Y. (1) 7.4 Which electrode, Zn or Pb, is the ANODE? (1) 7.5 Write down the half-reaction that takes place at the CATHODE. (2) 7.6 How will the mass of the zinc electrode change while the cell is in operation? Write down only INCREASES, DECREASES or REMAINS THE SAME. (1) 7.7 Calculate the initial emf of this cell under standard conditions. (4) [12] TOTAL: 75 Copyright reserved

Technical Sciences/P2 1 Hlayiso/Prediction 2026 NSC Prediction DATA FOR TECHNICAL SCIENCES GRADE 12 PAPER 2 TABLE 1: PHYSICAL CONSTANTS NAME SYMBOL VALUE Standard pressure pθ 1,01× 105 Pa Standard temperature Tθ 0 °C / 273 K TABLE 2: FORMULAE Emf Eθcell = Eθcathode – Eθanode or Ecell = Ereduction – Eθoxidation θ θ or Ecell = Eoxidising agent – Eθreducing agent θ θ Copyright reserved Please turn over

Technical Sciences/P2 2 Hlayiso/Prediction 2026 NSC Prediction TABLE 3: THE PERIODIC TABLE OF ELEMENTS 1 2 13 14 15 16 17 18 (I) (II) 3 4 5 6 7 8 9 10 11 12 (III) (IV) (V) (VI) (VII) (VIII) 1 2 Atomic number 2,1 H He 1 KEY 4 29 3 4 5 6 7 8 9 10 1,0 1,5 Electronegativity 1,9 Cu Symbol 2,0 2,5 3,0 3,5 4,0 Li Be B C N O F Ne 7 9 63,5 11 12 14 16 19 20 11 12 13 14 15 16 17 18 0,9 Na 1,2 Mg 1,5 Aℓ 1,8 Si 2,1 P 2,5 S 3,0 Cℓ Ar Approximate relative atomic mass 23 24 27 28 31 32 35,5 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 0,8 K 1,0 Ca 1,3 Sc 1,5 Ti 1,6 V 1,6 Cr 1,5 Mn 1,8 Fe 1,8 Co 1,8 Ni 1,9 Cu 1,6 Zn 1,6 Ga 1,8 Ge 2,0 As 2,4 Se 2,8 Br Kr 39 40 45 48 51 52 55 56 59 59 63,5 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 0,8 Rb 1,0 Sr 1,2 Y 1,4 Zr Nb 1,8 Mo 1,9 Tc 2,2 Ru 2,2 Rh 2,2 Pd 1,9 Ag 1,7 Cd 1,7 In 1,8 Sn 1,9 Sb 2,1 Te 2,5 I Xe 86 88 89 91 92 96 101 103 106 108 112 115 119 122 128 127 131 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 0,7 Cs 0,9 Ba La 1,6 Hf Ta W Re Os Ir Pt Au Hg 1,8 Tℓ 1,8 Pb 1,9 Bi 2,0 Po 2,5 At Rn 133 137 139 179 181 184 186 190 192 195 197 201 204 207 209 87 88 89 0,7 Fr 0,9 Ra Ac 226 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 140 141 144 150 152 157 159 163 165 167 169 173 175 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 232 238 Copyright reserved Please turn over

Technical Sciences/P2 3 Hlayiso/Prediction 2026 NSC Prediction TABLE 4A: STANDARD REDUCTION POTENTIALS Half-reactions Eθ (V) F2 (g) + 2e– ⇌ 2F– + 2,87 Co3+ + e– ⇌ Co2+ + 1,81 H2 O2 + 2H+ + 2e– ⇌ 2H2 O + 1,77 MnO–4 + 8H+ + 5e– ⇌ Mn2+ + 4H2 O + 1,51 Cℓ2 (g) + 2e– ⇌ 2Cℓ– + 1,36 Cr2 O2– + – 3+ 7 + 14H + 6e ⇌ 2Cr + 7H2 O + 1,33 + – O2 (g) + 4H + 4e ⇌ 2H2 O + 1,23 MnO2 + 4H+ + 2e– ⇌ Mn2+ + 2H2 O + 1,23 Pt2+ + 2e– ⇌ Pt + 1,20 Br2 (ℓ) + 2e– ⇌ 2Br– + 1,07 NO–3 + 4H+ + 3e– ⇌ NO(g) + 2H2 O + 0,96 Hg2+ + 2e– ⇌ Hg(ℓ) + 0,85 Ag+ + e– ⇌ Ag + 0,80 NO3 + 2H+ + e– ⇌ NO2 (g) + H2 O – + 0,80 Fe3+ + e– ⇌ Fe2+ + 0,77 O2 (g) + 2H+ + 2e– ⇌ H2 O2 + 0,68 Increasing strength of oxidising agents I2 + 2e– ⇌ 2I– Increasing strength of reducing agents + 0,54 Cu+ + e– ⇌ Cu + 0,52 SO2 + 4H+ + 4e– ⇌ S + 2H2 O + 0,45 2H2 O + O2 + 4e– ⇌ 4OH– + 0,40 Cu2+ + 2e– ⇌ Cu + 0,34 SO4 + 4H+ + 2e– ⇌ SO2 (g) + 2H2 O 2– + 0,17 Cu2+ + e– ⇌ Cu+ + 0,16 Sn4+ + 2e– ⇌ Sn2+ + 0,15 S + 2H+ + 2e– ⇌ H2 S(g) + 0,14 2H+ + 2e– ⇌ H2 (g) 0,00 Fe3+ + 3e– ⇌ Fe – 0,06 Pb2+ + 2e– ⇌ Pb – 0,13 Sn2+ + 2e– ⇌ Sn – 0,14 Ni2+ + 2e– ⇌ Ni – 0,27 Co2+ + 2e– ⇌ Co – 0,28 Cd2+ + 2e– ⇌ Cd – 0,40 Cr3+ + e– ⇌ Cr2+ – 0,41 Fe2+ + 2e– ⇌ Fe – 0,44 Cr3+ + 3e– ⇌ Cr – 0,74 Zn2+ + 2e– ⇌ Zn – 0,76 2H2 O + 2e– ⇌ H2 (g) + 2OH– – 0,83 Cr2+ + 2e– ⇌ Cr – 0,91 Mn2+ + 2e– ⇌ Mn – 1,18 Aℓ3+ + 3e– ⇌ Aℓ – 1,66 Mg2+ + 2e– ⇌ Mg – 2,36 Na+ + e– ⇌ Na – 2,71 Ca2+ + 2e– ⇌ Ca – 2,87 Sr2+ + 2e– ⇌ Sr – 2,89 Ba2+ + 2e– ⇌ Ba – 2,90 Cs+ + e– ⇌ Cs – 2,92 K+ + e– ⇌ K – 2,93 Li+ + e– ⇌ Li – 3,05 Copyright reserved Please turn over

Technical Sciences/P2 4 Hlayiso/Prediction 2026 NSC Prediction TABLE 4B: STANDARD REDUCTION POTENTIALS Half-reactions Eθ (V) Li+ + e– ⇌ Li – 3,05 K+ + e– ⇌ K – 2,93 Cs+ + e– ⇌ Cs – 2,92 Ba2+ + 2e– ⇌ Ba – 2,90 Sr2+ + 2e– ⇌ Sr – 2,89 Ca2+ + 2e– ⇌ Ca – 2,87 Na+ + e– ⇌ Na – 2,71 Mg2+ + 2e– ⇌ Mg – 2,36 Aℓ3+ + 3e– ⇌ Aℓ – 1,66 Mn2+ + 2e– ⇌ Mn – 1,18 Cr2+ + 2e– ⇌ Cr – 0,91 2H2 O + 2e– ⇌ H2 (g) + 2OH– – 0,83 Zn2+ + 2e– ⇌ Zn – 0,76 Cr3+ + 3e– ⇌ Cr – 0,74 Fe2+ + 2e– ⇌ Fe – 0,44 Cr3+ + e– ⇌ Cr2+ – 0,41 Increasing strength of oxidising agents Cd2+ + 2e– ⇌ Cd Increasing strength of reducing agents – 0,40 Co2+ + 2e– ⇌ Co – 0,28 Ni2+ + 2e– ⇌ Ni – 0,27 Sn2+ + 2e– ⇌ Sn – 0,14 Pb2+ + 2e– ⇌ Pb – 0,13 Fe3+ + 3e– ⇌ Fe – 0,06 2H+ + 2e– ⇌ H2 (g) 0,00 S + 2H+ + 2e– ⇌ H2 S(g) + 0,14 Sn4+ + 2e– ⇌ Sn2+ + 0,15 Cu2+ + e– ⇌ Cu+ + 0,16 SO4 + 4H+ + 2e– ⇌ SO2 (g) + 2H2 O 2– + 0,17 Cu2+ + 2e– ⇌ Cu + 0,34 2H2 O + O2 + 4e– ⇌ 4OH– + 0,40 SO2 + 4H+ + 4e– ⇌ S + 2H2 O + 0,45 Cu+ + e– ⇌ Cu + 0,52 I2 + 2e– ⇌ 2I– + 0,54 O2 (g) + 2H+ + 2e– ⇌ H2 O2 + 0,68 Fe3+ + e– ⇌ Fe2+ + 0,77 NO–3 + 2H+ + e– ⇌ NO2 (g) + H2 O + 0,80 Ag+ + e– ⇌ Ag + 0,80 Hg2+ + 2e– ⇌ Hg(ℓ) + 0,85 NO–3 + 4H+ + 3e– ⇌ NO(g) + 2H2 O + 0,96 Br2 (ℓ) + 2e– ⇌ 2Br– + 1,07 Pt2+ + 2e– ⇌ Pt + 1,20 MnO2 + 4H+ + 2e– ⇌ Mn2+ + 2H2 O + 1,23 O2 (g) + 4H+ + 4e– ⇌ 2H2 O + 1,23 Cr2 O2– + – 3+ 7 + 14H + 6e ⇌ 2Cr + 7H2 O + 1,33 Cℓ2 (g) + 2e ⇌ 2Cℓ– – + 1,36 MnO–4 + 8H+ + 5e– ⇌ Mn2+ + 4H2 O + 1,51 H2 O2 + 2H+ + 2e– ⇌ 2H2 O + 1,77 Co3+ + e– ⇌ Co2+ + 1,81 F2 (g) + 2e– ⇌ 2F– + 2,87 Copyright reserved