Physical Sciences Paper 2 (English)

May-June 2017 — Grade 12 / Matric — Physical Sciences

Past Paper 2017 Grade 12 English Physical Sciences Hub →

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🎯 150 marks ❓ 12 questions ⏱️ 3h 📄 19 pages 📝 94 items found ∑ 1 math symbols 📚 5 topics

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Q2— Section header —

Q1— Section header —

1.1

1.3The energy change during a chemical reaction is known as bond energy heat of reaction activation energy

1.6The reaction below reaches equilibrium in a closed container (g\ (g\ 2NH (g\ energy Consider the following

1.7hich ONE of the following pairs represents the c onjugate acid and the conjugate base HPO CONJUGATE ACID CONJUGATE BASE

1.9Which ONE of the half cells below will result in the HIGHEST emf when it is

1.10hich of the following processes are ALL involved in the preparation of ammonium sulphate Ostwald process

Q2— Section header —

2.1Define the term functional group of organic compounds. (2\

2.2Write down the:

2.2.1Structural formula of the functional group of aldehydes (1\

2.2.2Name of the functional group of carboxylic acids (1\

2.3The IUPAC name of an organic compound is 2,4 dimethylhexan For this compound, write down the:

2.3.1Homologous series to which it belongs (1\

2.3.2Structural formula (3\

2.4Write down the IUPAC names of the following compounds:

2.4.1(3\

2.4.2(2\ [13]13

Q3— Section header —

3.1For the compounds listed above, wr ite down the:

3.1.1Structural formula of compound (3\

3.1.2LETTER that represents a POSITIONAL isomer of compound (1\

3.1.3LETTER that represents a CHAIN isomer of compound (1\

3.2The boiling points increase from compound to com pound

3.2.1Give a reason for this increase in terms of the m olecular structure (1\

3.2.2Name the ntermolecular force in these compounds responsible for this increase (1\

3.3

3.3.1From these boiling points , choose the boiling point represented by in the table above (1\

3.3.2Fully explain how you arrived at

Q3— Section header —

3.4Hydrogen bonding is responsible for the relatively high boiling p oints of compounds to in comparison with hydrocarbons of similar molecular size. Draw TWO structural formulae of compound . Use

3.5Compound reacts with propanoi c acid in the presence of concentrated sulphuric acid. Write down the:

3.5.1Type of reaction that takes place (1\

3.5.2Structural formula of the organic product formed (2\ [17]17

Q4— Section header —

4.1Write down the type of reaction represented by:

4.1.1(1\

4.1(1\

4.2Write down the IUPAC name of compound (2\ For reaction , write down:

3.1The t ype of elimination reaction (1\

3.2TWO reaction conditions Write down the: FORMULA o inorganic reactant needed for rea ction (1\ Balanced equation, using structural formula for reaction

Q5— Section header —

5.1For this investigation, write down the function of the:

5.1.1Graduated syringe (1\

5.1.2Copper( \ oxide (1\

5.2ow will you know when the reaction is completed? (1\

5.3Write do wn the independent variable for this investigation. (1\

5.4Use he collision theory to fully explain the difference in reaction rates of experiment and experiment (3\ Experiment Conical flask

5.616

Q6— Section header —

6.1Consider the balanced e quation for reversible reaction below (g\ (g\ 2NO(g\

6.1.1What is meant by the term reversible reaction (1\ The sketch graph below shows the relationship between the value of the equilibrium constant ( for this reaction

6.1.2Is the reaction ENDOTHERMIC or EXOTHERMIC? (1\

6.1.3Fully explain the answer

Q6— Section header —

6.1.4More N (g\ is added (1\

6.1.5The pressure is increased by decreasing the volume (1\

6.2Initially titanium (Ti\ and 426 g chlorine gas (C are mixed in a sealed container at a certain temperature. The reaction reaches equilibrium acco rding to the following

6.2.1Calculate the equilibrium constant ( \or th reaction at this temperature. (8\

6.2.2More titanium is now added to the equilibrium mixture. How will this (s\ Choose from INCREASES, DECREASES REMAINS THE SAME.

Q7— Section header —

7.1Ethanoic acid (CH COOH\ is an acid that ionises incompletely in water according to the following balanced equation: COOH(aq\ COO (aq\ (aq\

7.1.1Write dow the term used for the underlined phrase above (1\

7.1.2ethanoic acid solution has a pH of at 25 . Calculate the concentration of the hydronium ions, H (aq\ in the solution

7.2A standard solution of potassium hydroxide (KOH\ is pre pared in 250 cm volumetric flask. During a titration 12,5 cm of this solution neutralise 25 cm

7.2.1Define base according to the Arrhenius theory. (2\

7.2.2Calculate the mass of potassium hydroxide used to prep are the solution above in the 250 volumetric flask

7.2.3Will the pH of the solution in the conical flask at the end point GREATER THAN 7, SMALLER THAN 7 or EQUAL TO 7? (1\

Q7— Section header —

2.3with the aid of a ba lanced chemical equation (3\ 13

Q8— Section header —

8.1Dependent variable (1\

8.1.2Name of an instrument needed to measure the emf of the cell (1\

8.1.3Name of the component of the cell that ensure electrical neutrality (1\

8.1.4Values of TWO standard condition needed to ensure that the standard emf is obtained Write down the conclusion th

8.3Identify electrode with the aid of a calculation

8.4Write down the overall \ cell reaction that takes place when th cell is in eration (3\ 15]

Q9— Section header —

9.1Is this an ELECTROLYTIC or a GALVANIC cell (1\

9.2hich electrode or the Medal is the anode (1\

9.3Write down the: alf reaction that takes place at electrode Oxidation number of gold (Au\ in the electrolyte (1\

9.3.3Energy change that takes place in this cell (1\

9.3.4Visible change that occurs on electrode after the cell functions for a while (1\ Besides improving appearance, state ONE other reason why the medal is electroplated. (1\ State ONE of the two possible changes

Q10— Section header —

10.1The letters to in the table below represent some fertilisers raw materials used in the preparation of fertilisers

10.1.1LETTERS representing TWO raw materials used in the preparation of compound (2\

10.1.2NAME or FORMULA of the acid needed to prepare compound (1\

10.1.3LETTER representing the solid raw material used in the contact process (1\

10.1alanced equation for the preparation of compound (3\

10.1.5LETTER representing the raw material that supplies th e primary nutrient needed for development of flowers (1\

10.22 kg bag of fertiliser is labelled as follows 2 : 3 : 2 (22\ Calculate the mass of the

10.2.1Phosphorous in the bag (3\

10.2.2Filler in the bag (3\ 4] TOTA Sulph Air Methane Potassium chloride Ammonium sulphate Ammonium nitrate

Mathematical Content

f(x)

Topics Identified

MechanicsChemical BondingOrganic ChemistryElectrochemistryThermodynamics

Mark Allocation

Total150 marks

Sections20 + 13 + 17 + 16 + 16 = 82 marks

Paper information

SubjectPhysical Sciences

Year2017

SessionMay-June

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages19

Downloads4

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.

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