Technical Sciences Paper 2 (English)

May-June 2019 — Grade 12 / Matric — Technical Sciences

Past Paper 2019 Grade 12 English

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🎯 150 marks ❓ 12 questions ⏱️ 3h 📄 4 pages 📝 80 items found 📚 1 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.1Which ONE of the following comp unds is an example of a saturated hydrocarbon?

1.4The v apour pressure of ethanol is lower than the vapour pressure of ethane because ethane has intermolecular forces

1.5Ion migration in a functioning electrochemical cell takes place through the

1.6Co nsider the redox reaction: Fe(s\ + Cu 2+ (aq\ Fe 2+ (aq\ Cu(s\ Which ONE

1.7Which ONE combination of the fields below changes in the propagation of an electromagnetic wave

1.8The speed of gamma ray is

1.9An i mage formed by concave lens is

1.10In the diagram below, ray ray. refracted

Q2— Section header —

2.1Define the term organic molecule (2\

2.2Write down the:

2.2.1Letter representing an alkene (1\

2.2.2Letter of a molecule with the general formula C 2n (1\

2.2.3Letter representing a saturated hydrocarbon (1\

2.2.4etter representing an aldehyde (1\

2.2.5Structural formula of the POSITIONAL ISOMER of molecule

2.2.6IUPAC name of the org

Q2— Section header —

2.2Structural formula of compound (2\

2.3Molecule represent polythene

2.3.1Define the term monomer (2\

2.3.2Write down the NAME of the reaction that results in the formation of polythene

2.3.3Draw the structural fo rmula of a monomer of polythene [1

Q3— Section header —

3.1What is meant by vapour pressure (2\

3.2Write down the molecular formula of compounds and (2\

3.3What type of isomers are these compounds?

3.4Identify the type of intermolecular forces acting between the molecules of compound

3.5What is the trend in the vapour pressure of compounds and (1\ 3.

Q4— Section header —

4.1Identify the type of reaction represented by:

4.1.1(1\

4.1.2(1\

4.1.3(1\

4.2Consider reaction

4.2.1Us structural formula to rite down a balance chemical equation

4.2.2Name ONE reaction condition required for th is reaction to take place

4.3Reaction results in the formation of an alkane

4.3.1Write down the IUPAC name of the alkane formed during this reaction (2\

4.3.2Write down the NAME or SYMBOL of any TWO catalyst

4.4The a lkane formed during reaction reacts with excess oxygen

4.4.1Name the type of reaction that takes place when an alkane reacts with oxygen

4.4.2Write down the name or formulae of the TWO products formed during the reaction in

Q4— Section header —

Q5— Section header —

5.1What type of electrochemical cell is r epresented in the diagram above? (1\

5.2Write down the energy conversion that takes place in this cell. (2\ 5.

5.5Is the reaction taking place in this electrochemical cell SPONTANEOUS or NON SPONTANEOUS (1\

5.6Explain the answer to

Q5— Section header —

6.1Draw a labelled diagram representing the set up of the cell above

6.2Define the term oxidation (2\ 6. Write down the NAME

Q7— Section header —

7.1A ray of light moves from a less optically dense medium to a more optically dense medium at an angle.

7.1.1Wh ich phenomena will occur when the ray of light moves from less optically dense medium to more optically dense medium? Write

7.1.2Explain the answer to QUESTION

7.1.1(2\

7.2Define the term critical angle (2\

7.3Name TWO conditions necessary for total internal reflection to occur. 2\ 7. An inciden

7.5A ray of white light falls at an angle onto a triangular prism and splits into its constituent colours

7.5.1Write down the NAME of the phenomenon described above (1\

7.5.2Into how many colours does white light split (1\

7.5.3Which colour in white light has the fastest speed when it travels through a triangular prism? (1\

7.5.4How d oes the wavelength of the light change when entering the prism Write only INCREASES, DECREASES

7.5.5Explain the answer to

Q7— Section header —

7.6Calculate the frequency of blue light if the wavelength is 2,63 x 10 m. 21

Q8— Section header —

8.1Which type of lens is used in a simple magnifying glass (1\

8.2An object represented by an arrow is placed in front of a concave lens.

8.2.1Draw a ray diagram to indicate the position and size of the image formed when the object is placed between the focal point (F\and 2F. (Use an arrow to represent the object (5\

8.2.2Write down THREE properties of the image that will be observed (3\

8.2.3The lens in QUESTION

8.2is now replac ed with a con vex lens. Will the image be LARGER, SMALLER or THE SAME SIZE (1\

8.3Name the eye condition that can be corrected using concave lens. (1\ 8. Name

Q9— Section header —

9.1State TWO properties of electromagnetic wave (2\ 9. What is a

Topics Identified

Leadership

Mark Allocation

Total150 marks

Sections20 = 20 marks

Paper information

SubjectTechnical Sciences

Year2019

SessionMay-June

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages18

Downloads7

Examination context

Decade2010s

Years ago7y

Season—

Start day—

Exam period—

Days since exam—

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