Technical Sciences Grade 11 P2 November Mock 2026 Memo (Eng)

hlayiso mock exams Practice Series: Grade 11 Exam Preparation WWW.HLAYISO.COM NATIONAL SENIOR CERTIFICATE GRADE 11 TECHNICAL SCIENCES P2 NOVEMBER EXAMINATION 2026 (MOCK) MARKING GUIDELINES MARKS: 75 These marking guidelines consist of 6 pages. Copyright reserved Please turn over

Technical Sciences/P2 2 Hlayiso/Mock 2026 NSC – Marking Guidelines GENERAL MARKING GUIDELINES 1. Calculations: Marks are awarded for the correct formula, correct substitution and the correct final answer WITH the correct unit, as indicated by the ticks (✓). No mark is awarded for a formula that is not followed by a substitution. 2. Units: Penalise an omitted or incorrect unit only ONCE per question. Temperatures may be given in ◦ C or K where a temperature CHANGE is used (∆T in ◦ C = ∆T in K). 3. Positive marking: Where an incorrect answer from a previous question is used correctly in a later calculation, full marks are awarded for the later calculation. 4. Half-reactions: Award full marks for the correct half-reaction with the correct arrow (→). If ⇌ is used, award a maximum of 1 mark. If the half-reaction is reversed, award 0 marks. Ignore phases. 5. Oxidation numbers: 1 mark for the correct working (equation of oxidation numbers), 1 mark for the final oxidation number WITH its sign. 6. Definitions: Accept equivalent wording that conveys the same meaning. Where key words are underlined, deduct 1 mark for EACH key word or phrase that is omitted. 7. Negative marking: If a candidate must explain a choice and the choice is incorrect, no marks are awarded for the explanation. Copyright reserved Please turn over

Technical Sciences/P2 3 Hlayiso/Mock 2026 NSC – Marking Guidelines QUESTION 1 1.1 B ✓✓ (2) 1.2 D ✓✓ (2) 1.3 A ✓✓ (2) 1.4 C ✓✓ (2) 1.5 A ✓✓ (2) [10] QUESTION 2 2.1 The gas (air) in the cylinder ✓ (1) 2.2 CLOSED ✓ Energy (heat/work) can be exchanged with the surroundings, but matter (gas) cannot leave or enter the cylinder. ✓ (2) 2.3 The heat added to a system is equal to the increase in internal energy of the system plus the work done by the system (on its surroundings). ✓✓ Accept: ∆Q = ∆U + ∆W with all symbols explained. (2) 2.4 ∆Q = ∆U + ∆W ✓ 1 800 = ∆U + 650 ✓ ∆U = 1 150 J ✓ (3) 2.5 INCREASES ✓ (1) 2.6 The internal energy of the gas increases (∆U is positive), so the average kinetic energy of the gas particles increases. ✓ (1) [10] Copyright reserved Please turn over

Technical Sciences/P2 4 Hlayiso/Mock 2026 NSC – Marking Guidelines QUESTION 3 3.1 The quantity of heat (energy) needed to raise the temperature of 1 kg of a substance by 1 K (1 ◦ C). ✓✓ (2) 3.2.1 Type of liquid / specific heat capacity of the liquid ✓ (1) 3.2.2 Any ONE: Mass of the liquid / heater (power) / time of heating / starting temperature / type of container ✓ (1) 3.2.3 Ethyl alcohol has a LOWER specific heat capacity (2 460 J·kg–1 ·K–1 ) than water (4 200 J·kg–1 ·K–1 ). ✓ Less energy is needed to raise the temperature of 1 kg of ethyl alcohol by 1 K, so with the same energy supplied, its temperature rises faster. ✓ (2) 3.2.4 C = mc ✓ C = (0,2)(4 200) ✓ C = 840 J·K–1 ✓ (3) 3.2.5 Q = mc∆T ✓ Q = (0,2)(4 200)(36 – 20) ✓ Q = 13 440 J ✓ OR (positive marking from 3.2.4): Q = C∆T = (840)(16) = 13 440 J (3) 3.3 Water has a HIGH specific heat capacity. ✓ It can absorb a large quantity of heat from the engine with only a small increase in its own temperature. ✓ (2) 3.4.1 Isolated system ✓ (1) 3.4.2 When two bodies at different temperatures are in contact in an isolated system, the heat lost by the hotter body is equal to the heat gained by the colder body. ✓✓ (2) 3.4.3 Qlost by aluminium = Qgained by water OR (mc∆T)Aℓ = (mc∆T)water ✓ (0,25)(900)(120 – Tf ) ✓ = (0,4)(4 200)(Tf – 18) ✓ 27 000 – 225Tf = 1 680Tf – 30 240 1 905 Tf = 57 240 ✓ Tf = 30,05 ◦ C ✓ (5) 3.4.4 Any ONE: No heat is lost to the surroundings / no heat is absorbed by the container / no water evaporates ✓ (1) [23] Copyright reserved Please turn over

Technical Sciences/P2 5 Hlayiso/Mock 2026 NSC – Marking Guidelines QUESTION 4 4.1 A substance that gains (accepts) electrons (and is therefore reduced). ✓✓ (2) 4.2.1 (+1) + Mn + 4(–2) = 0 ✓ Mn = +7 ✓ (2) 4.2.2 2(+1) + S + 3(–2) = 0 ✓ S = +4 ✓ (2) 4.2.3 2Fe + 3(–2) = 0 ✓ Fe = +3 ✓ (2) 4.3.1 Mg → Mg2+ + 2e– ✓✓ (2) 4.3.2 Ag+ + e– → Ag ✓✓ Accept 2Ag+ + 2e– → 2Ag (2) 4.3.3 Ag+ (accept AgNO3 ) ✓ (1) 4.3.4 The oxidation number of magnesium INCREASES ✓ from 0 (in Mg) to +2 (in Mg2+ ). ✓ (2) 4.3.5 Any ONE: A grey / silver (shiny) solid is deposited on the magnesium ribbon / the magnesium ribbon becomes thinner (dissolves) / the beaker becomes warm ✓ (1) [16] Copyright reserved Please turn over

Technical Sciences/P2 6 Hlayiso/Mock 2026 NSC – Marking Guidelines QUESTION 5 5.1 The chemical decomposition of a substance (electrolyte) by passing an electric current through it. ✓✓ OR: A process in which electrical energy is used to drive a non-spontaneous chemical reaction. (2) 5.2 Electrical energy → chemical energy ✓ (1) 5.3 X✓ (1) 5.4 Cu2+ + 2e– → Cu ✓✓ (2) 5.5 Cu → Cu2+ + 2e– ✓✓ (2) 5.6 REDUCTION ✓ Cu2+ ions GAIN electrons / the oxidation number of copper decreases from +2 to 0. ✓ (2) 5.7 Electrode X: becomes thinner / mass decreases / is eaten away ✓ Electrode Y: becomes thicker / mass increases / a reddish-brown (pink) layer of copper is deposited ✓ (2) 5.8 Anode sludge (anode mud / slime) ✓ (1) 5.9 REMAINS (approximately) THE SAME ✓ (1) 5.10 Any TWO: Electroplating (e.g. chromium or nickel plating) / extraction of metals such as aluminium from their ores / production of chlorine and sodium hydroxide (chlor-alkali industry) / purification of other metals / production of hydrogen ✓✓ (2) [16] TOTAL: 75 Copyright reserved