Technical Sciences Paper 2 (English)

November 2020 — Grade 12 / Matric — Technical Sciences

Past Paper 2020 Grade 12 English

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🎯 150 marks ❓ 12 questions 📄 15 pages 📝 91 items found 📚 1 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.1Which ONE of the structural formulae below represents a secondary alcohol? (2\

1.2o which homologous series does dichloromethane belong Alkanes

1.3In w hich ONE of the options below are the intermolecular forces arranged from the weakest to the strongest

1.6In the cell notation of a galvanic cell, the double vertical lines (//\ represent a/the phase separator.

1.8The diagram below shows light ray incident on a rectangular glass prism Which ONE of the following represents the

1.9During the dispersion of white light, w hic h colo ur in the visible spectrum has the smallest angle of refraction?

1.10learner used a lens to focus the image of a well

Q2— Section header —

2.2.1(1\

2.2.2(1\

2.2.3(1\ 2. Writ e down the IUPAC name of the or ganic compounds repr

2.4.1(2\

2.4.2(2\ 2. Draw the structural formulae of the ISOMER of the organic compounds

Q2— Section header —

2.7.1Is comp ound saturated or unsaturated? (1

2.7Explain the answer to

Q2— Section header —

Q3— Section header —

3.1Define the term vapour pressure (2\

3.2Use the table above to answer question that follow.

3.2.1Describe the trend in the vapour pressure of the compound above

3.2.2Exp lain the answer to QUESTION

3.21. Refer to CHAIN LENGTH/MOLAR MASS, STRENGTH OF INTERMOLECULAR FORCES and ENERGY Technical Sciences/P2

3.3.1Iden tify the homologous series represented by graph and respectively. (2\

3.3.2Explain the difference in the boiling point of the two homologous series represented by graph and

Q4— Section header —

4.1Write down the NAME or TYPE of reaction represented by the following letters:

4.1.1(1\

4.1.2(1\

4.1.3(1\

4.2art om the alke e,

4.2.1Other reactant (1\

4.2.2Catalyst (1\

4.3Use STRUCT RAL ORMULAE to write down

4.4Write TWO reaction onditions for reaction (2\

4.5Use molecular formulae to write down a balanced equation for the reaction of the alkene in the flow diagram in excess oxygen

4.6Write down the NAME o the organic compound in the flow diagram that can be used as a monomer of

5.2Is the electrolysis of copper( II \chloride a spontaneous or a non spontaneous reaction? (1\

5.3Explain the answer to

Q5— Section header —

5.6Define the term reducing agent (2\

5.7For the cell above rite down the:

5.7.3 Ne reaction (2\

6.1he cell notation Zn(s\ Zn 2+ (aq\ Cu

6.1.1Define the term galvanic cell (2\

6.1Draw a labelled diagram to represent the Zn Cu cell. Show the direction of electron flow in the external circuit.

6.1Write down TWO standard conditions under which the Zn Cu ce ll operates. (2\

6.1To which half cell do the anions in the salt bridge migrate? (1\

6.1.5Explain the answer to

Q6— Section header —

6.2.1Identify electrode by means of a calculation. 6.

6.2.3Which electrode will experience a decrease in mass? (1\

6.2.4Explain the answer to QUESTION

6.2.3(2 22

Q7— Section header —

7.1The diagram below shows the reflection of a light ray that strikes a flat mirror with a 30 angle of incidence

7.1.1What is reflection (2\ Line Technical Sciences/P2 13 DBE/

7.1.2Ray AO (1\

7.1.3Ray OB (1\

7.1.4Line (1\

7.1.5Angle (1\

7.1.6Angle (1\

7.2What is the magnitude of angle 2 (1\

7.3How will the speed of light be affected when a light ray travels from a ir into water perpendicular to the surface (1\ 7.

7.4.1 hich medium air or water has

7.4hat will happen to the DIRECTION of the light ray as it enters the

7.4rite down the NAME of the phenomenon in QUESTION

7.4.27. ray of light moves from water to

7.5.1Define the t erm critical angle (2\

7.5.2 What observation will be made (2 The incident a gle in

Q7— Section header —

7.5Describe the phenomenon total internal reflection

7.5Is th e incident angle GREAT ER THAN or SMALLER THAN the critical angle (1\

Q8— Section header —

8.1Define the term dispersion. (2\

8.2Name any FOUR colours in visible light. (4\

8.3State THREE properties of the image fo rmed in a plane mirror. (3\

8.4Redraw the diagrams below in the ANSWER BOOK and c omplete EACH to sho w the path of the ray after passing through the lens.

8.4.1(1

8.4.2(2\

8.4.3(2\ [14] Technical Sciences/P2 15 DBE/ November 2020 SC/NSC Copyright rese14

Q9— Section header —

9.1Define an electromagnetic wave (2\

9.2Which property of radio waves makes it suitable to tran smit signal over long distance (1\

9.3What is a photon (1\

9.4Writ e down the NAME of the electromagnetic wave that is used 9. .1 To etect counterfeit notes

9.6Calculate the energy of light with a wavelength of 4,06 x 10 11 m. (5\ [14 TOTAL

Topics Identified

Leadership

Mark Allocation

Total150 marks

Sections20 + 21 + 14 = 55 marks

Paper information

SubjectTechnical Sciences

Year2020

SessionNovember

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages19

Downloads2

Examination context

Decade2020s

Years ago6y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2020

Days since exam2,178

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