Technical Sciences Grade 12 P2 EC June Exemplar 2021 Memo

NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 JUNE/JUNIE 2021 TECHNICAL SCIENCES P2/ TEGNIESE WETENSKAPPE V2 MARKING GUIDELINE/NASIENRIGLYN (EXEMPLAR/EKSEMPLAAR) MARKS/PUNTE: 75 This marking guideline consists of 5 pages/ Hierdie nasienriglyn bestaan uit 5 bladsye.

2 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/JUNE/JUNIE 2021) QUESTION/VRAAG 1 1.1 D  (2) 1.2 C  (2) 1.3 B  (2) 1.4 A  (2) 1.5 B  (2) [10] QUESTION/VRAAG 2 2.1 Combustion / verbranding  (1) 2.2 Structural isomers / struktuurisomere  (1) 2.3 Polymers / polimere  (1) 2.4 n-type (semiconductor) / n-tipe (halfgeleier)  (1) [4] QUESTION/VRAAG 3 3.1 3.1.1 An organic molecule is a molecule which contains carbon atoms.  ʼn Organiese molekule is ʼn molekule wat koolstofatome bevat.  (2) 3.1.2 CnH2n  (1) 3.1.3 Alcohols / Alkohole  (1) 3.1.4 Hydroxyl group / Hidroksielgroep  (1) 3.1.5 (2) 3.2 3.2.1 Esters: Dipole-dipole intermolecular forces  Esters: Dipool-dipool intermolekulêre kragte  (1) Alcohols: Hydrogen bond  Alkohole: Waterstofbinding  (1) 3.2.2 Methanoic acid / Metanoësuur  (1) Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

(EC/JUNE/JUNIE 2021) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 3 3.2.3 (2) 3.2.4 (1) 3.3 3.3.1 Same molecular formula, C5H12  Dieselfde molekulêre formule, C5H12  (1) 3.3.2 Different chain length / Kettinglengte verskil  (1) 3.3.3 Alkanes / Alkane  (1) 3.4 3.4.1 Pentane / Pentaan  (1) 3.4.2 2-methyl  butane  / 2-metiel  butaan  (2) 3.4.3 Pentane / Pentaan  (1) 3.4.4 B (1) 3.4.5 B is branched;  the more branches in the organic compound, the smaller the surface area. B is vertak;  hoe meer takke die organiese verbinding het, hoe kleiner is die oppervlakarea.  (2) 3.5 3.5.1 Plastics are synthetic materials derived from organic compounds.  Plastiek is sintetiese materiale afkomstig van organiese verbindings.  (2) 3.5.2 USE / GEBRUIKE B Food-packaging plastics / Voedselverpakkings-plastiek  C Squeezable bottles / Drukbare waterbottels  E Flexible water pipes / Buigbare waterpype  (Any 2 x 1) (2) [27] Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

4 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/JUNE/JUNIE 2021) QUESTION/VRAAG 4 4.1 Vapour pressure is the pressure exerted by a vapour at equilibrium with its liquid in a closed system.  Dampdruk is die druk wat uitgeoefen word deur ʼn damp wat in ewewig is met sy vloeistof in ʼn geslote sisteem.  (2) 4.2 4.2.1 Dipole-dipole intermolecular forces  Dipool-dipool intermolekulêre kragte  (1) 4.2.2 Dipole-dipole intermolecular forces  Dipool-dipool intermolekulêre kragte  (1) 4.3 Viscosity of chlorohexane is HIGHER.  Chlorohexane has stronger dipole-dipole intermolecular forces. Pentane has weaker dispersion / London forces.  Viskositeit van chloro-heksaan is HOËR.  Chloroheksaan het sterker dipool-dipool intermolekulêre kragte. Pentaan het swakker dispersie / Londonkragte.  (2) 4.4 Pentane/ Pentaan  It has weak London forces.  Less energy will be required to overcome intermolecular forces.  Dit het swak Londonkragte.  Minder energie benodig om intermolekulêre kragte te oorkom.  (3) 4.5 London forces / Londonkragte  (2) [11] QUESTION/VRAAG 5 5.1 Hydrocarbons are organic compounds that consist only of hydrogen and carbon atoms.  Koolwaterstowwe is organiese verbindings wat slegs uit waterstof- en koolstofatome bestaan.  (1) 5.2 5.2.1 CH4 + 2O2  CO2 + 2H2O   bal (3) 5.2.2 Excess oxygen / Oormaat energie  (1) [5] Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

(EC/JUNE/JUNIE 2021) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 5 QUESTION/VRAAG 6 6.1 6.1.1 Hydrolysis / Hidrolise  (1) 6.1.2 Hydration / Hidrasie  (1) 6.1.3 Esterification / Esterifikasie  (1) 6.2 6.2.1 Hexan-2-ol or 2-hexanol Heksan-2-ol of 2-heksanol  (1) 6.2.2 1-bromohexane / 1-bromoheksaan  (1) 6.2.3 Water  (1) 6.3 6.3.1 Pt/Pd/Ni as a catalyst  Pt/Pd/Ni as ʼn katalisator  (1) 6.3.2 No water added, unreactive solvent, CHCl2, CCl4  Geen water bygevoeg nie, onreaktiewe oplosmiddel, CHCl2, CCl4  (1) 6.4 (2) 6.5 6.5.1 (4) 6.5.2 Ethyl hexanoate  Etielheksanoaat  (1) 6.5.3 (3) [18] TOTAL/TOTAAL: 75 Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief