Technical Sciences Grade 12 P2 Eastern Cape June 2025 Memo

NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 JUNE/JUNIE 2025 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 MARKING GUIDELINE/NASIENRIGLYN MARKS/PUNTE: 75 This marking guideline consists of 7 pages./ Hierdie nasienriglyn bestaan uit 7 bladsye. This document was downloaded from www.ecexams.co.za.

2 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/JUNE/JUNIE 2025) QUESTION/VRAAG 1 1.1 B (2) 1.2 C (2) 1.3 A (2) 1.4 C (2) 1.5 D (2) [10] 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 a CH2 group. Reeks organiese verbindings wat deur dieselfde algemene formule beskryf kan word en waarin die een lid van die volgende met CH2-groep verskil. (2) 2.2 2.2.1 Halo alkanes/Haloalkane (Accept: Alkyl halides/Aanvaar: Alkielhaliede) (1) 2.2.2 Alcohols/Alkohole (1) 2.3 2.3.1 G (1) 2.3.2 C (1) 2.3.3 E (1) 2.3.4 A (1) 2.3.5 F (1) 2.4 2.4.1 Organic molecules with the same molecular formula, but different structural formulae. Organiese molekule met dieselfde molekulêre formule, maar verskillende struktuurformules. (2) 2.4.2 Functional isomers/ Funksionele isomere (1) 2.5 PRIMARY/ PRIMÊRE The hydroxyl group/ OH-group/ Functional group is connected to a carbon atom that is connected to only one other carbon atom. Die hidroksielgroep/ OH-groep/ Funksionele groep is aan koolstofatoom verbind wat aan net een ander koolstofatoom verbind is. (3) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.

EC/JUNE/JUNIE 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 3 2.6 2.6.1 Methyl propanoate /Metielpropanoaat (2) 2.6.2 MARKING CRITERIA/NASIENKRITERIA: Correct functional group/ Korrekte funksionele groep Both substituents correct/ Beide substituente korrek Whole structure correct/ Hele struktuur korrek NOTE: If a bond or hydrogen is missing 2/3 LET WEL: As binding of waterstof ontbreek 2/3 (3) 2.6.3 Carbonyl (group) / Karboniel (groep) (1) 2.6.4 O II -C-H ACCEPT/AANVAAR: O II R-C-H (1) 2.7 2.7.1 A chemical reaction in which monomer molecules join to form a polymer Chemiese reaksie waarin monomeermolekule verbind om polimeer te vorm (2) 2.7.2 Polyethylene/ Polythene Poliëtileen/ Politeen (2) [26] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.

4 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/JUNE/JUNIE 2025) QUESTION/VRAAG 3 3.1 The temperature at which the vapour pressure equals atmospheric pressure. Die temperatuur waarby die dampdruk aan atmosferiese druk gelyk is. (2) 3.2 3.2.1 (London forces and) Dipole-dipole forces (London-kragte en) Dipool-dipoolkragte (1) 3.2.2 (London forces and) Hydrogen bonds (London-kragte en) Waterstofbindings (1) 3.3 Both compounds A and B/propane and butane have London forces. Compound B/butane has a longer chain length/larger surface area than compound A/propane. Compound B/butane has stronger intermolecular forces/London forces than compound A/propane. More energy is needed to overcome the intermolecular forces/ London forces/bonds in compound B/butane than in compound A/propane. Beide verbindings A en B/propaan en butaan het London-kragte. Verbinding B/butaan het langer kettinglengte/groter oppervlakte as verbinding A/propaan. Verbinding B/butaan het sterker intermolekulêre kragte/London-kragte as verbinding A/propaan. Meer energie is nodig om die intermolekulêre kragte/ London-kragte/bindings in verbinding B/butaan te oorkom as in verbinding A/propaan. OR/OF Both compounds A and B/propane and butane have London forces. Compound A/propane has a shorter chain length/smaller surface area than compound B/butane. Compound A/propane has weaker intermolecular forces/London forces than compound B/butane. Less energy is needed to overcome the intermolecular forces/London forces/bonds in compound A/propane than in compound B/butane. Beide verbindings A en B/propaan en butaan het London-kragte. Verbinding A/propaan het korter kettinglengte/kleiner oppervlakte as verbinding B/butaan. Verbinding A/propaan het swakker intermolekulêre kragte/London-kragte as verbinding B/butaan. Minder energie is nodig om die intermolekulêre kragte/London-kragte/bindings in verbinding A/propaan te oorkom as in verbinding B/butaan. (4) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.

EC/JUNE/JUNIE 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 5 3.4 The pressure exerted by a vapour at equilibrium with its liquid in a closed system. Die druk wat deur damp in ewewig met sy vloeistof in geslote sisteem uitgeoefen word. (2) 3.5 Propane/ Compound A Propaan/Verbinding A It has the weakest intermolecular force. Accept: It has the lowest boiling point Dit het die swakste intermolekulêre krag. Aanvaar: Dit het die laagste kookpunt (2) 3.6 Butan-1-ol/ Compound E Butan-1-ol/ Verbinding E (1) [13] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.

6 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/JUNE/JUNIE 2025) QUESTION/VRAAG 4 4.1 4.1.1 Addition/Hydrogenation Addisie/Hidrogenasie/Hidrogenering (1) 4.1.2 Addition/Hydrohalogenation Addisie/Hidrohalogenasie/Hidrohalogenering (1) 4.1.3 Substitution/Hydrolysis of haloalkanes Substitusie/Hidrolise van haloalkane (1) 4.2 4.2.1 H2 (1) 4.2.2 Pt(Platinum)/Pd(Palladium)/Ni(Nickel/Nikkel) (1) 4.3 4.3.1 (2) MARKING CRITERIA/NASIENKRITERIA: Correct functional group/ Korrekte funksionele groep Whole structure correct/ Hele struktuur korrek NOTE: If a bond or hydrogen is missing 1/2 LET WEL: As binding of waterstof ontbreek 1/2 4.3.2 2-Bromo butane 2-Bromobutaan (2) 4.4 4.4.1 Hydration Hidrasie (2) 4.4.2 Butan -2-ol (2) 4.4.3 Excess water Strong acid/ H2SO4/ Sulfuric acid/ H3PO4/ Phosphoric acid Oormaat water Sterk suur/ H2SO4/ Swaelsuur/ H3PO4/ Fosforsuur (2) [15] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.

EC/JUNE/JUNIE 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 7 QUESTION/VRAAG 5 5.1 A pure semiconductor. 'n Suiwer halfgeleier. (2) 5.2 Diamond / Si(Silicon) / Ge(Germanium) / Sn(Gray tin) Diamant / Si(Silicon) / Ge(Germanium) / Sn(Grys tin) Any ONE/Enige EEN (1) 5.3 REVERSE BIAS / TEENVOORSPANNING The p-type material is connected to the negative terminal of the cell and the n-type is connected to the positive terminal of the cell. Die p-tipe materiaal is aan die negatiewe terminaal van die sel gekoppel en die n-tipe is aan die positiewe terminaal van die sel gekoppel. (3) 5.4 The process of adding impurities to intrinsic semiconductors. Die proses waardeur onsuiwerhede by intrinsieke halfgeleiers gevoeg word. (2) 5.5 To improve the electrical conducting ability /electrical conductivity (of intrinsic semiconductors) Om die elektriese geleidingsvermoë (van intrinsieke halfgeleiers) te verbeter (2) 5.6 A P-type semiconductor P-tipe halfgeleier (1) [11] TOTAL/TOTAAL: 75 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief This document was downloaded from www.ecexams.co.za.