Physical Sciences Paper 2 (English)

Common 2018 — Grade 12 / Matric — Physical Sciences

Past Paper 2018 Grade 12 English Physical Sciences Hub →

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🎯 150 marks ❓ 10 questions ⏱️ 2h 📄 16 pages 📝 92 items found 📚 3 topics

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2.1and

Q2— Section header —

Q1— Section header —

1.1Which ONE of the following substances is NOT a pure substance Iron Sugar Steel

1.2The CORRECT chemical formula for potassium nitrate is PNO KNO (2\ Different isotopes of the same element have different atomic

1.4hich ONE of the following ionisation equation represents the second ionisation of magnesium? (2\

1.7In the compound, the ratio of the MASS of hydrogen to oxygen is always (2\

1.8

Q2— Section header —

2.1Define the term element Use the diagram and the key provided to answer the questions that follow. Write down a LETTER that represents the following

2.2.1Pure substance (1\

2.2.2Homogeneous mixture (1\

2.2.3Heterogeneous mixture (1\

Q2— Section header —

2.5(1\ [9]9

Q3— Section header —

3.1Define the term boiling point (2\ Use the information given in the graph to answer the questions that follow.

3.2Write down the

2.1Boiling point of liquid (1\

3.2.2Liquid which remains a liquid at 115 (1\

3.2.3Liquid that is most likely to be water (1\ State the PHASE CHANGE that takes place at the stage whe the vapour pressure is equal to atmospheric pressure.

3.5Explain the answer

Q3— Section header —

Q4— Section header —

4.1Define the term atomic number. (2\

4.2Write down the

4.2.1Chemical symbol of element using the notation

4.2.3lement ( or that is an al kali metal Chemical symbol of

4.3Element reacts with oxygen to form the compound with the chemical formula O.

4.3.1Predict the chemical formula that element Rb in the periodic table will form when it reacts with oxygen.

4.3.2Explain the answer QUESTION

4.4What is the trend in ionisation energy as you move from element to element Write down only INCREASES, DECREASES or REMAINS THE SAME. Explain the answer

4.5How many electrons does an ION of element have? Draw the A fbau diagram of this ion (3\

4.6When orbitals of identical energy are available, electrons are placed in individual orbitals before they are pa red. Give the name this rule. (1\

4.7Element occurs as these isoto pes in the following proportions 28(92, 23%\

Q5— Section header —

5.1Define the term physical change. (2\

5.2Write down the LETTER of the process that represents the following

5.2.1Physical change (1\

5.2.2Decomposition reaction (1\ Give the name of the physical change stated

Q5— Section header —

5.4State TWO properties of a reaction that indicate that a chemical change has taken place. (2\

5.5For process , write down:

5.5.1What the symbol represents (1\

5.5.2A BALANCED CHEMICAL EQUATION (Show the phases of ALL reactants and products (4\

5.6A 20 g sample of CaC in process decomposes to form 11 g of CaO In a second sample g decomposes to form

5.6.1State the law of constant composition (2\

Q5— Section header —

Q6— Section header —

6.1Choose the substance that describes the following

6.1.1Metallic structure (1\

6.1.2Structure of magnesium chloride (1\

6.2Explain how the type of bond in substance forms. (2\

6.3Name the type of bond that exists in substance (1\

6.4Magnesium and hlorine react to form compound agnesium hloride.

6.4.1Define the term compound. (2\

6.4.2Write down the NAME of the group to which magnesium belongs. (1\

6.4.3Write down the valency of chlorine atom. (1\

6.4.412

7.1Explain the meaning of the term hydrated (1\

7.2Write down a BALANCED CHEMICAL EQUATION to show how sodium carbonate dissociates in water. (2\

7.3Learners then take 10 of the prepared solution and allow it to react completely with 5 of dilute hydrochloric acid according the following balanced chemical equation

7.3.1Define the term a mole of a substance. (2\

7.3.2What type of chemical reaction is represented by the chemical equation above (1\

7.3.3Calculate the number of moles of hydrochloric acid in 5 of hydrochloric acid if its concentration is 1 mol (3\

7.4Calculate the mass of sodium chloride formed in the reaction in

Q7— Section header —

Q8— Section header —

8.2.1Investigative question (2\

8.2.2Dependent variable (1\

8.2.3Independent variable (1\

8.2.4Controlled variable (1\

8.3For th investigation, redict with reasons the substance that will yield the following

8.3.1The highest conductivity (2\

8.3.2Zero conducti vity (2\

8.4The substance tested in Experiment was analysed was found to contain 40% carbon, 6,67% hydrogen and 53 33% oxygen. Determine the molecular formula if the molar mass is 180 mol

Q9— Section header —

9.1Write down the type of reaction that takes place in the test tubes.

9.2A concentrated nitric acid solution is then added into each test tube to establish which one contains carbonate ions and which one contains sulphate ions. Bubbles are formed

9.2.1Identify which IONS (CARBONATE or SULPHATE\ are present in test tube (1\

9.2.2Write down a BALANCED CHEMICAL EQUATION that represents the reaction tween nitric acid and

9.3A solution of sodium carbonate was prepare by dissolving 5 g of the powder 100 of water. solution reacted with a b arium chloride

9.3.1Calculate the mass of barium carbonate that should form in this reaction. (5\ was found that only 8 3 g precipitate formed.

9.3.2Calculate the percentage yield. (2\ [12] Test tube Test tube Barium chloride solution12

Q10— Section header —

10.1Differentiate between the hydrosphere and biosphere (2\

10.2Write down the name of process:

10.2.1(1\

10.2.2(1\

10.2.3(1\

10.3Describe the energy changes during processes Write down only ENERGY GAINED or ENERGY LOST. (2\

10.4Describe the interaction between the hydrosphere and plants. (4\ [11] TOTAL: 150 PLANT CLOUDS Water vapour11

Topics Identified

MechanicsChemical BondingThermodynamics

Mark Allocation

Total150 marks

Sections20 + 9 + 18 + 12 + 12 + 11 = 82 marks

Paper information

SubjectPhysical Sciences

Year2018

SessionCommon

TypePast Paper

PaperPaper 2

LanguageEnglish

Pages16

Downloads5

Examination context

Decade2010s

Years ago8y

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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