Physical Sciences Memo 2 (English & Afrikaans)

Common 2018 — Grade 12 / Matric — Physical Sciences

Memo 2018 Grade 12 Bilingual Physical Sciences Hub →

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🎯 150 marks 📄 16 pages 📝 73 items found ∑ 1 math symbols 📚 4 topics

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Q1— Section header —

1.1(2\

1.2(2\

1.3(2\

1.4(2\

1.5(2\

1.6(2\

1.7(2\

1.8(2\

1.9(2\

1.10(2\ [20] 1120

Q2— Section header —

2.1Chemical bond is mutual attraction between two atoms resulting from the simultaneous attraction between their nuclei and outer electrons Chemiese binding is die wedersydse aantrekking tussen twee atome as

2.2.1(2\

2.2.2(2\

2.3

2.42,5 = 0,

2.5

2.6CN ha s a higher order bond/triple bond with more orbitals overlapping than CH, which is a single bond Thus CN bond nee ds more energy to

2.7CN has a longer bond length than CH because the H atom is smaller than the N atom CN het n grot er bindingslengte as CH omdat die

2.8Yes (1\

2.9HCN ha polar molecules with dipole dipole forces. O ha polar mole

Q3— Section header —

3.1has hydrogen bonds between the molecules has London forces/induced dipole forces has stronger intermolecular forces than N and therefor higher boiling point than N (Accept: more energy requires to overcome stronger

3.211

3.3both have weak London forces/induced dipole forces is a larger molecule /has a greater molecular mass /has a larger surface area than H therefore

3.4It has the weakest intermolecular forces /London forces It has t he low est boiling point It has the weakest intermolecular forces

Q4— Section header —

4.1Boyle s law Boyle se wet (1\

4.2Criteria for hypothesis/ Riglyne vir hipotese The dependent and independent variables are stated correctly. Die afhanklike en onafhanklike veranderlikes korrek genoem. State the relationship between the dependent and independent

4.3Refer to the last page of the memo for the graph drawn to scale Verwys na die laaste bladsy van die memo vir die skaalgrafiek Criteria for marking the graph Nasienkriteria vir grafiek se of correct scale

4.4Any set of values can be used from the table Enige stel waardes vanaf die tabel kan gebruik word: 70(174\ = (300\V = 40, (Accept/ Aanvaar 40,32 40,8 dm

4.5At high pressure a gas starts to deviate from ideal gas behaviour because the volume of the molecules of a gas and the intermolecular forces start to influence the measured value, causing it to be greater than t

4.7Temperature is an indication of the average kinetic energy of the molecules of a gas. If the temperature of a gas decreases, the molecules move slower and closer together up to a point w ere the gas will start to

4.8pV = nRT (70 000\(174 x 10 = n(8, 31\( 293\ n = 5 moles [18

Q5— Section header —

5.1n = 4 mole pV = nRT (120 000\V = (4\(8,31\(28 V = 0,

5.2POSITIVE

Q5— Section header —

Q6— Section header —

6.1.3Mark allocation/Nasienriglyne: Formula for/ Formule vir volume Substitution of 0,306 and 24,45 Vervanging van 0,306 en 24,45 Using ratio/ Gebruik verhouding

Q6— Section header —

2.1Sulphuric acid Swawelsuur (1\ 10

6.2.2Mark allocation/ Punte toekenning Any one of the formulae/Enige een van formules Substitution of/ Vervanging van 3 g (5 g 2 g\ atio/ erhouding

Q7— Section header —

7.1he minimum energy needed for a reaction to take place. Die minimum energie benodig vir die reaksie om plaas te vind [2 or 0] (2\

7.2More e nergy is released than absorbed energy of products is less than energy of reactants H is negative Meer energie word afgegee as opgeneem OF energie van die produkte is minder as die energie van reaktante

7.3products reactants 183, 400 216, mol

7.4Criteria for marking/ Nasienkriteria Lower curved line Laer kurwelyn Lower activation energy indicated Laer ak tivering senergie aange

7.5One mole of any gas occupies the same volume at the same temperature and pressure. Een mol van enige gas beslaan dieselfde volume by dies lfde temperatuur en druk [2 or 0] (2\ Course of reaction

7.6OPTION 1/ OPSIE 1 4NH 4NO Initial vol Change in vol 7,5 Ratio Final vol

7.7= 1, 59 mol n(N\ 22,2 = 1, 5857 mol = 4, 625 mol H : N : O

Q8— Section header —

8.1A hydroxide ion can act as proton acceptor n Hidroksiedioon kan optree as protonontvanger (2\

8.2Dative covalent bond Datiefkovalente binding (aq\ (aq\ (aq\ OR/ + NH (g\

8.6Mark allocation/Punte toekenning Usage of formula(e\ of c = n/V and/or n = m/M Usage or calculation of number of moles ( 3,75 mol of HNO atio erhouding 2:1

Q9— Section header —

9.2Mn is +7 / Mn The oxidation number of S increases from 2 to 0 e oksidasiegetal van S neem toe

Q10— Section header —

10.1Danger ous for workers because they can be trapped underground. Sinkholes (Any relevant answer\ Gevaarlik vir werkers want hulle kan ondergronds vasgekeer

10.3Oxidati on number of O decreases from (in O to (in NaOH\ Die oksidasiegetal van O neem af van 0 (in O

10.5= 70 % (2\

10.6(Fe\ (0, 65\(2 500\ or/of (2 500\ = 1 625 Fe extracted ontgin (Accept/Aanvaar 1,625 x 10 (2\

4.3Graph of volume versus pressure/ Grafiek van volume teenoor druk Volume (dm Pressure/Druk (kPa\ 0 50 100 150 200 250 300

Mathematical Content

f(x)

Topics Identified

MechanicsChemical BondingElectrochemistryThermodynamics

Mark Allocation

Total150 marks

Sections20 + 12 = 32 marks

Paper information

SubjectPhysical Sciences

Year2018

SessionCommon

TypeMemo

PaperPaper 2

LanguageBilingual

Pages16

Downloads3

Examination context

Decade2010s

Years ago8y

Season—

Start day—

Exam period—

Days since exam—

About Physical Sciences examination preparation

Grade 12 Physical Sciences combines Physics and Chemistry. Paper 1 covers mechanics, electricity, waves, and optics, while Paper 2 focuses on chemical bonding, organic chemistry, and electrochemistry.

Every available Grade 12 Physical Sciences past paper and memorandum is collected in the Physical Sciences hub at physical-science.freemode.co.za — browse all years, sessions and languages in one place.

How to use this resource for revision

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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

applying scientific principles

selecting appropriate equations

interpreting scientific information

performing calculations with correct units

explaining scientific reasoning

A practical revision approach

Create a one-page formula sheet and practice deriving units from first principles. The memorandum rewards correct formula identification, proper substitution, and accurate unit handling.

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Archived on23 September 2026

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