Physical Sciences Paper 2 (English)

Common 2016 — Grade 12 / Matric — Physical Sciences

Past Paper 2016 Grade 12 English Physical Sciences Hub →

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🎯 150 marks ❓ 1 questions 📄 17 pages 📝 64 items found 📚 4 topics

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Q2— Section header —

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

1.1The t ype of bond formed between a H ion and H O is called a/an hydrogen bond dative covalent bond ionic bond covalent bond (2\

1.4The bond ener gy of bond is 338 kJ.mol whereas the bond energy of

1.5A gas of volume V is at a temperature T and pressure P in a gas syringe. If the pressure on the gas is doubled and the temperature halved, then the volume that the gas

1.6Which ONE of the graphs below CORRECTLY represents the deviation of real gas from ideal gas behaviour at very high pre ssure

1.10During the processing of gold ore, zinc is added to the gold cyanide solution to produce gold according to the balanced equation below Zn(s\ + 2NaAu(CN\ (aq\ 2NaCN(aq\ The reducing agent in this rea

Q2— Section header —

2.1Define the term electronegativity. (2\ Draw the Lewis diag ram of an oxygen difluoride molecule. Calculate the electronegativity difference between O and F in oxygen difluoride and predict the polarity of the bond.

2.5The diagram below shows the energy change that takes place when two atoms move towards each other.

2.5.1What does and represent? (2\

2.5.2Define the concept represented by (2\

2.5.3Explain the relationship between bond order, bond length and bond energy. (3\ [17] 201617

Q3— Section header —

3.1Define the term boiling point. (2\

3.2Formulate an investigative question for this experimen (2\

3.3In w hich compound the table above will the strongest intermolecular force occur Give a reason for the answer. (2\

3.4he learners now use 40 of each of the compounds above in the experiment ill it affect the boiling point ? Choose YES or NO. Give a reason for the answer. (2\

3.5Methylated spirit is highly flammable. State TWO safety precautions that should be taken when using methylate d spirit in the laboratory. (2\

3.6Which compound the table above will have the highest rate of evaporation? Give a reason for the answer.

3.7Sunflower oil is a non polar compound with induced dipole forces between the molecules while wate r is a polar molecule with hydrogen bonds between its molecules. Explain why the boili ng point of sunflower oil is higher than

4.1Charles Law describes the relat ionship between the volume and temperature of an enclosed mass of gas at constant pressure. The volumes of a gas different temperatures at constant pressure are given in the table below

4.1.2Draw a graph of volume versus temperature at constant pressure on the attached graph paper (4\

4.1.3Extrapolate the graph (extend the gr aph\ and state at what temperature the graph intersects the axis. (1\

4.1.4hat is significant about this temperature? (2\

4.1.5Calculate the volume that this gas will occupy at 120 constant pressure. (3\

4.1.6The experiment is now c onducted at a lower constant pressure. On the graph drawn for QUESTION

4.1.2, sketch the graph that will be obtaine d at a lower pressure. Label this graph P. (2\

4.2An unknown gas with a mass of 0,77 g occupies a volume of 0,32 at a te mperature of 27 C and pressure kPa. Assume that the gas

4.2.1Calculate the molar mass of the gas

4.2.2Write down the MOLECULAR FORMULA or NAME of the gas named

Q4— Section header —

5.1Define the term concentration. (2\

5.2Eight (8\ grams of Na is dissolved in water to prepare 500 of solution. Calculate the concentration of the Na solution. (3\

5.3A 10 g sample of a compound contains 2,6 g of potassium, 3,5 g of chromium and 3,8 g of oxygen.

5.3.1Define the term empirical formula (2\

5.3.2Determine the empirical formula of this compound. (7\ 4] QUESTION (Start on a new page.\ Learners made a mi ni volcano in a science lab oratory by adding sodium bicarbonate ethanoic acid

6.2Determine the limiting reagent in this reaction. (6\

6.3Calculate the mass of the other substance in excess (3\

6.4Calculate the volume of CO produced at STP (4\ [15] 11 201615

Q7— Section header —

7.1Is this reaction ENDOTHERMIC or EXOTHERMIC ? Give a reason for the answer. (2\

7.2Explain why all chemical reactions need activation energy. (2\ Why is this reaction not considered to be environmentally friendly

Q8— Section header —

8.1

8.2.1Identify the conjugate acid base pairs in the above reaction (4\ Define the term ampholyte (1\ Choose an ampholyte the above reaction

8.3.3Calculate the percentage purity of the sodium carbonate solution. (8\ [21 12

Q9— Section header —

9.1Define the term oxidation in terms of oxidation number. (2\ Write down the following f or the reaction above

9.2.1ormula of the reducing agent (2\

9.2.2ame of the oxidising agent (2\

9.2.3xidation half reaction (2\

9.2.4alanced net ionic equation using the ion electron method (4\

9.3Use oxidation numbers to explain your choice of oxidising agent in QUESTION

2.2(2\ [14]14

Q10— Section header —

10.1Which mining methods are used in South Africa? (2\

10.2Give TWO reasons why mining is important for the South African economy. (2\

10.3State TWO negative effects of mining with respect to the environment. (2\

10.4Most alloys of gold are used in je wellery and dentistry. The gold content in jewellery is expressed in carat. The term indicates the number of parts of gold present in each 24 parts of alloy.

10.4.1Pure gold, which is 24 carat, is not used to make jewellery. Give ONE reason y, referring to the propert ies of gold (1\

10.4.2Apart from gold being used in jewellery and dentistry, name ONE other use of gold. (1\ 8] TOTAL:

4.1.2, 4.1.3 and 4.

1.6Hand in this ANSWER SHEET together with the ANSWER BOOK 50

Topics Identified

MechanicsChemical BondingElectrochemistryThermodynamics

Mark Allocation

Total150 marks

Sections20 + 17 + 15 + 14 = 66 marks

Paper information

SubjectPhysical Sciences

Year2016

SessionCommon

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages17

Downloads7

Examination context

Decade2010s

Years ago10y

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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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

applying scientific principles

selecting appropriate equations

interpreting scientific information

performing calculations with correct units

explaining scientific reasoning

A practical revision approach

Create a one-page formula sheet and practice deriving units from first principles. The memorandum rewards correct formula identification, proper substitution, and accurate unit handling.

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