Physical Sciences Paper 2 (English)

Common 2017 — Grade 12 / Matric — Physical Sciences

Past Paper 2017 Grade 12 English Physical Sciences Hub →

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🎯 150 marks ❓ 1 questions 📄 16 pages 📝 65 items found 📚 4 topics

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Q4— Section header —

Q2— Section header —

1.10\ in the ANSWER BOOK, for example 1.11 E.

1.1Which ONE of the bonds between the atoms below ha the hig hest polarity? (2\ olid iodine sublimes e asily. The intermolecular force

1.4According to Boyle s law if T is constant. is constant. is constant. if n s constant.

1.5One mole of any gas occupies the same volume at the same temperatur and pressure statement is known as Charles law Gay Lussac

1.6One mole of gas ALED in a container has volume at temperature

1.10Which ONE of the reaction below will produce the sal sodium ethanoate dium aceta (s\+ CH COOH

Q2— Section header —

2.1Define the term covalent bond (2\ Draw Lewis structures for

2.2.1(2\

2.2.2(2\

2.3How many lone pair electrons are on the central atom in the CO molecule? (1\

2.4Identify ONE of the substances in Reaction that can form a dative covalent when reacting with an acid (1\

2.5Write down the shape the:

2.5.1O molecule (1\

2.5.2molecule (1\

2.6Although the molecules of CH and CH is polar while CH polar. Give a reason for the difference in molecular polarity. (1\

Q3— Section header —

3.1Explain w hy ethanol is soluble water. R efer to the relative strength of the intermolecular forces in ethanol and water.

3.2Explain why t he boiling point of iodine is higher than that of bromine. Refer to the intermolecular forces present in EACH substance in the explanation.

3.3Explain why phosphine will evaporate faster than ammonia by referring to the type of intermolecular fo rces present in EACH substance

3.4Water, ethanol and bromine are all liquids at room temperature Which ONE will have the highest vapour pressure? (1\

Q3— Section header —

4.1Draw a graph of pressure versus temperature on the attached ANSWER SHEET Extrapolate the graph so that i t intersects

4.2What conclusion can be made from the final graph? (2\

4.3Explain why it will not be possible to obtain accurate values at very low temperature (2\

4.4the kinetic molecular theory to explain the effect of increase in temperature on the pressure of

4.5Under which conditions of temperature and pressure will a real gas act as an ideal gas? (2\

4.6Calculate the gradient of the graph (3\

4.7Use the answer

Q4— Section header —

5.1emperature of the gas, in in the balloon when i t bursts

5.2nitial amount of gas (in moles\n the balloon ] QUESTION (Start on a new page.\

6.1The decomposition of hydrogen peroxide in the presence of a catalyst at standard pressure and room temperature is given by the u nbalanced chemical equation below (aq\ (g\ The oxygen gas is collected and the volume is recorded over a period of time.

6.1.1Balance the equation. (2\

6.1.2How would a catalyst affect the reaction? (2\

6.1.3Use the information the graph to calculate the mass of hydrogen peroxide that decomposed. (6\ 600 Time (s\ Volume O (cm balloon

6.2In an experiment, a learner adds 500 with a concentration of 0,36 mol to 1, g of magnesium in a test tube. She records the change in the mass of magnesium as the reaction proceeds at

2.1Identify the limiting agent in this reaction. Give a reason for the answer.

2.2lculate the number of moles of unreacted hydrochloric acid in the test tube after 3 minutes. [19

Q7— Section header —

7.1Define the term activation energy (2\

7.2Is th e combustion reaction of butane exothermic or endothermic ? Give a reason for the answer. (2\

7.3Draw a sketch graph of potential en ergy versus course of reaction for the action above Clearly indicate

Q8— Section header —

8.1Two react ion of sulph uric acid are shown i n the diagram below

8.1.1

8.1.2Write down a balanced equation for eaction (3\

8.1.3Write down the NAME of the salt represented by (2\

8.1.4Write down the FORMULA of ampholyte (2\

8.1.5Write down the formulae of the TWO conjugate acid base pairs in eaction (4\

8.2A solution of sodium hydroxide ( is prepared by dissolving solid NaOH in 500 cm water This solution react

9.1Determine the ox idation number of CHROMIUM in Cr (aq\ (2\

9.2Define reduction in terms of electron transfer. (2\

9.3Write down the FORMULA of the substance that undergoes oxidation. Explain the answer in terms of oxidation numbers. (2\ Reaction NaOH Reaction 2 Salt + Product Ampholyte

9.4Write down th FORMULA of the oxidis ing agent. (2\

9.5rite down the reduction half reaction.

9.6Write down the net balanced ionic equation for the reaction, using the ion electron method. [13

Q10— Section header —

10.1State TWO advantages of open cast mining when compared to deep shaft (underground\ mining.

10.2Is ron oxidi or reduc during the reaction Give a reason for the answer (2\ State TWO

10.4Give ONE reason why gold is present as an element in the ore. (2\

10.5What role does oxygen ga \ play in the reaction? (2\ [10] TOTAL: 201710

4.1GRAPH OF PRESSURE VERSUS TEMPERATURE Pressure (kPa\ Temperature (K\ @+

Topics Identified

MechanicsChemical BondingElectrochemistryThermodynamics

Mark Allocation

Total150 marks

Sections20 + 11 + 23 + 10 = 64 marks

Paper information

SubjectPhysical Sciences

Year2017

SessionCommon

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages16

Downloads5

Examination context

Decade2010s

Years ago9y

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.

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applying scientific principles

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performing calculations with correct units

explaining scientific reasoning

A practical revision approach

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