Physical Sciences Paper 2 (English)

November 2017 — Grade 12 / Matric — Physical Sciences

Past Paper 2017 Grade 12 English Physical Sciences Hub →

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🎯 150 marks ❓ 12 questions ⏱️ 3h 📄 20 pages 📝 83 items found ∑ 1 math symbols 📚 4 topics

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Q2— Section header —

Q1— Section header —

1.10\ in the ANSWER BOOK, for example 1.11 D. The IUPAC name of organic compound with molecular formula Heptanal Heptan Heptan Heptanoic acid (2\

1.2Which ONE of the following structures is the functional group of aldehydes? (2\ Which ONE of the following equations represents a cracking process? 5CH = CH (CH (CH

1.4The potential energy diagram for a chemical reaction is shown below. Consider the foll owing statements regarding the graph above represents the potential energy of the products formed during the reverse

1.5A certain chemical reaction reaches equilibrium at 25 C. The equilibrium constant, K , for the reaction at this temperature is 1,0 x 10

1.6Consider the following chemical reaction equilibrium in a closed container 2HgO(s\ (g\ More HgO(s\s now added to the container at constant temperature.

1.7Which ONE of the following solutions, each of concentration 0,1 mol , has the highest pH (aq\ (aq\ COOH(aq\ (2\

1.8The cell notation for a galvanic cell is as follows Ni(s\ || Pb | Pb(s\ Which ONE of the

1.9Which ONE of the following combinations CORRECTLY show the products formed during the electrolysis of

1.10Which ONE of the following is NOT part of the eutrophication process? Algal bloom acterial nitrogen fixation epletion of oxygen in water Increase in plant nutrients in water

Q2— Section header —

2.1Study the structural formula below. For this compound, write down the:

2.1.1Homologous series to which it belongs (1\

2.1.2IUPAC name (2\

2.1.3IUPAC name of the organic acid used in its preparation (1\

2.1.4STRUCTURAL FORMULA of its straight chain unbranched functional isomer (2\

2.2Writ e down the structural formula of 4 methylpentan one. (3\

2.3Consider the structural formula below. For this compound, write down the:

2.3.1General formula of the homologous series to which it belongs (1\

2.3.2IUPAC name (3\ [13]13

3.1Give a reason why alkanes are said to be SATURATED (1\

3.2Define vapour pressure. (2\ Use the information n the graph above to answer the following questions

3.3.1What is the effect of an increase in temperature on vapour pressure Choose from INCREASES, DECREASES or NO EFFECT. (1\

3.3.2

3.3.3Which compound has the longest chain length? Fully explain the answer. (4\ Compound has FIVE carbon atoms. Draw the structural formula chain isomer of Write down

Q4— Section header —

4.1Is compound a PRIMARY, SECONDARY or TERTIARY alcohol? Give a reason for the answer. (2\

4.2Write down the type of:

4.2.1Elimination reaction represented by

4.2.2Addition reaction represented by (1\

4.2.3Elimination reaction represented by (1\ Sodium hydroxide is used as one of t he reactants in reaction

4.3.1What type of reaction takes place here (1\ State the TWO reaction conditions for this reaction (2\

4.4Write down the FORMULA of an inorganic reac tant needed for reaction (1\

4.5Using STRUCTURAL FORMULAE, w rite down a b alanced equation for reaction (3\

4.6Write down the IUPAC name of compound (1\ 5] Compound , Pt Compound (Organic product HBr

Q5— Section header —

5.1Define reaction rate (2\ Which curve or , represents the results of experiment Explain the

5.4

5.5

5.5.1How will the heat of reaction of experiment compare with that of experiment Choose from MORE THAN

5.5.2How will the activation energy of the reaction in experiment compare with that of the reaction in experiment Choose from MORE THAN, LESS THAN or EQUAL TO (1\

5.6The rate of the reaction in experiment is higher than that of experiment Fully explain this statement by referring to the collision theo (3\

Q6— Section header —

6.1Define chemical equilibrium (2\ At equilibrium it is found that 1,12 g CO(g \ is present in the container.

6.2Calculate the:

6.2.1quilibrium concentration of the COBr

6.2.2

6.3Which ONE of the following CORRECTLY describes the K value when equilibriu m is reached at a lower temperature < 0,19 = 0,19 (1\

6.4

Q7— Section header —

7.1mmonia ionises in water to form a basic solution according to the following balanced equation: (g\ H

7.1.1Is ammonia a WEAK or a STRONG base? Give a reason for the answer. (2\

7.1.2Write down the conjugate acid of NH (g\ (1\

7.1Identify ONE substance in this reaction that can behave as ampholyte in some reactions

7.2A learner adds distilled water to soil sample and then filters the mixture. The pH of the

2.1Is the soil sample ACIDIC or BASIC? Refer to the graph above and give a reaso n for the answer.

Q8— Section header —

8.1ners set up a galvanic cell measure its emf under standard conditions.

8.1Write down the name of component (1\

8.1Is the ANODE or the CATHODE (1\

8.1Write down the overall (net\ cell reaction that takes place i n this cell when it is working (3\

8.1Calculate the initial emf of this cell. (4\ AgNO (aq\ 0,29 g sample 495 cm

8.2Consider the half cell and represented in the table below HALF CELL (aq\ (aq\

8.2.1Write down the NAME of a suitable electrode for half cell (1\ State the s tandard conditions under which the

8.2.4Which c ombination of half cells will produce the highest emf? Choose from or NO

Q9— Section header —

9.1What type of p ower source AC or DC, is used to drive the reaction in this cell? (1\

9.2When an electric current passes through the CuC (aq\ the mass of electrode increases Is electrode the

9.3The impure copper contains zinc impurities which are oxidised to zinc ions. Refer to the relative strengths of oxidising agents to explain why zin c ions will not influence the quality of the pure copper

9.4.2How will the concentration of the electrolyte change as the reaction proceeds? Choose from INCREASES, DECREASES or REMAI NS THE SAME. (1\ 9] 9.4.1 What will be observed at electrode (1\

Q10— Section header —

10.1The equations below represent two industrial processes involved in the prepar ation of ammonium nitrate.

10.1.1NAME of substance (1\

10.1.2FORMULA of substance (1\

10.1.3NAME given for reaction (1\

10.1NAME or FORMULA of the catalyst used in tion (1\

10.1Name of process (1\

10.1Balanced equation for the preparation of ammonium nitrate from the products obtained in process and process

10.2A 15 kg bag of fertiliser contains 5% phosph 10% nitrogen and potassium. alculate the

10.2.1Mass of phosphorus in the bag

10.2.2Mass of filler in the bag 4] TOTAL: Pro cess + 5O (g\ 4NO + O(g\ 2NO(g\ O

Mathematical Content

f(x)

Topics Identified

ElectricityOrganic ChemistryElectrochemistryThermodynamics

Mark Allocation

Total150 marks

Sections20 + 13 + 17 = 50 marks

Paper information

SubjectPhysical Sciences

Year2017

SessionNovember

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages20

Downloads6

Examination context

Decade2010s

Years ago9y

SeasonSpring (SH)

Start daySunday

Exam periodNovember 2017

Days since exam3,274

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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