Physical Sciences Grade 12 KZN March Test 2025 QP

} KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 12 o PHYSICAL SCIENCES " COMMON ASSESSMENT TASK “ MARCH 2025 MARKS: 100 TIME: 2 hours This question paper consists of 10 pages and 4 data sheets.

Physical Sciences NSC March 2025 Test INSTRUCTIONS AND INFORMATION 1. This question paper consists of SEVEN questions. Answer ALL the questions in the ANSWER BOOK. 2. Start EACH question on a NEW page in the ANSWER BOOK. 3. Number the answers correctly according to the numbering system used in this question paper. 4. Leave ONE line between two subquestions, for example between QUESTION 2.1 and QUESTION 2.2. You may use a non-programmable calculator. You may use appropriate mathematical instruments. Show ALL formulae and substitutions in ALL calculations. Round off your final numerical answers to a minimum of TWO decimal places. oe enon Give brief motivations, discussions et cetera where required. 10. You are advised to use the attached DATA SHEETS. 11. Write neatly and legibly. Copyright reserved Please turn over

Physical Sciences QUESTION 1: MULTIPLE CHOICE QUESTIONS NSC March 2025 Test Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter (A — D) next to the question number (1.1 — 1.6) in the ANSWER BOOK. 1.1. Anastronaut with a mass of 70 kg is on a planet where his weight is 550 N. The gravitational acceleration on the planet is ... m-s?. A B Cc D 7,86 0,13 38500 786 (2) 1.2. A ball of mass m travelling to the right at velocity v strikes a wall and rebounds to the left at velocity 0,25 v. <«<— 0,25 v O The change in momentum of the ball is ... A B Cc D 1.3. Agirl throws a ball upwards. 0,75 mv left. 1,25 mv left. 0,75 mv right. 1,25 mv right. Which ONE of the following combinations give the DIRECTIONS of the ball’s velocity, acceleration, and the net force that the ball experiences as it travels upwards just after leaving the girl's hand? Velocity Acceleration Net Force A Upward Downward Downward B Upward Upward Upward Cc Downward Downward Downward D Upward Downward Upward Copyright reserved (2) Please turn over

Physical Sciences NSC March 2025 Test 1.4 Consider the molecular formula below: C3HsO The name of the homologous series that the above compound belongs to is a/an... A ketone. B alcohol. Cc aldehyde. D carboxylic acid. (2) 1.5 Given the following four organic molecules: Ethanal, ethanol, ethanoic acid, and ethane. Which ONE of the following is CORRECT when the above compounds are arranged in their decreasing order of vapour pressure? A Ethanoic acid, ethanol, ethanal, ethane. B Ethanoic acid, ethanal, ethanol, ethane Cc Ethane, ethanol, ethanal, ethanoic acid. D Ethane, ethanal, ethanol, ethanoic acid. (2) 1.6 Which ONE of the following reaction types will be used to prepare ethene and propane from pentane under high temperatures and pressures? A Combustion B Esterification Cc Thermal cracking D Photosynthesis (2) [12] Copyright reserved Please turn over

Physical Sciences NSC March 2025 Test QUESTION 2 (Start on a new page) A boy on a skateboard is pulled by a horizontal force F to the left, as shown in the sketch below. The combined mass of the boy and skateboard is 60 kg. A total frictional force of 70 N opposes the motion. The boy and skateboard accelerate at 1,5 m-s® to the left. Ignore the rotational effects of the wheels. 2.1. Draw a labelled free-body diagram showing all the forces acting on the boy and skateboard together. (4) 2.2 Calculate the magnitude of the force F. (4) 2.3 The force F is increased several times, and the acceleration is measured for each value of F, while all other forces remain constant. Draw a sketch graph for the system showing the relationship between acceleration and F, from the moment the force F acts on the system. (3) 2.4 When force F is removed, the boy and skateboard continue to move to the left for a short distance. The skateboard then hits a stone and stops. Explain what happens to the boy. (1) 2.5 Name and state the physics law which is applied in QUESTION 2.4. (3) [15] Copyright reserved Please turn over

Physical Sciences NSC March 2025 Test QUESTION 3 (Start on a new page) A ball is thrown vertically upwards from the top of a building at a velocity of 20 m-s*. The velocity-time graph for part of the motion of the ball is shown below. Ignore air resistance. nN o ok a A Oo Velocity (m-s) u 3.1 Define a projectile. (2) 3.2 Write down the magnitude and direction of the acceleration of the ball. (2) 3.3. Determine the: 3.3.1 Time taken for the ball to reach the maximum height (3) 3.3.2 Maximum height reached by the ball above the building (3) The ball continues in its motion and hits the ground 5 seconds after it was thrown. 3.4 Calculate the: 3.4.1 Speed with which the ball hits the ground (3) 3.4.2 Height of the building (4) [17] Copyright reserved Please turn over

Physical Sciences NSC March 2025 Test QUESTION 4 (Start on a new page) Acar of mass 1 600 kg travelling to the right at 80 km-h" runs into the back of a stationary bakkie of unknown mass. The two vehicles stick together and move to the right at 6 m-s*. After collision Before collision ' ' a ' 80 km-h' ; 4 bakkie 1 car _ 1 l re r ' } ‘ i 8 S ' 4.1 Convert 80 km-h" to ms. (2) 4.2 Calculate the change in momentum of the car. (3) 4.3. Write down the magnitude and direction of the change in momentum of the bakkie. (1) 4.4 State the principle of conservation of linear momentum in words. (2) 4.5 Calculate the mass of the bakkie. (4) [12] Copyright reserved Please turn over

Physical Sciences QUESTION 5 (Start on a new page) NSC March 2025 Test The letters A to F in the table below represent organic compounds. HH H H HH ~ LL | | || 40 A Sc C-C—C-H B Ho—C-0-K Ho Ah hia OH c Pentan-2-one D CHsCH2COCH2CH3 I H— C—H Br Br H L IL 1 | E H—- C-C—C-C—C-+H |F Methyl propanoate hl Abd H— ra H 5.1 Define the term homologous series. 5.2 Consider the organic compound B. Write down the: 5.2.1 5.2.2 Homologous series to which this compound belongs IUPAC name of the functional isomer of this compound 5.3 Write down the: 5.3.1 5.3.2 IUPAC name of compound E (2) (1) (3) GENERAL FORMULA of the homologous series to which compound A belongs 5.4 Write down the LETTER(s) of the compound(s) that represent(s): 5.4.1 5.4.2 Copyright reserved The positional isomers An ester (1) (2) (1) Please turn over

Physical Sciences NSC March 2025 Test When making an ester, 60 g of propan-1-ol reacts with excess ethanoic acid to produce 90,78 g of the ester. The balanced equation for the reaction is: C3H7OH\q + CH3COOH aq) > Cs5H1002 (i) + H2O (1) 5.5 Write down the: 5.5.1 STRUCTURAL FORMULA of the ester produced. (3) 5.5.2 IUPAC name of the ester. (2) 5.5.3 NAME or FORMULA of the catalyst used. (1) 5.6 Calculate the percentage purity of propan-1-ol. hs QUESTION 6 (Start on a new page) Experiments 1 and 2 are performed to determine the boiling points of carboxylic acids and alcohols. The results obtained are shown in the table below. EXPERIMENT IUPAC NAME MOLECULAR | BOILING MASS POINT (g.mo!) (°C) 1 A | Methanoic acid 46 100,8 B | Ethanol 46 78,4 2 C | Propanoic acid 74 141,2 D | Butanol 14 117,7 6.1 Write down the property of alcohols which could make an experiment dangerous. (1) 6.2 Write down LETTERS of TWO compounds which are alcohols. (2) 6.3. What conclusion can be drawn from the results of these two experiments? (2) 6.4 Predict how the vapour pressure of compounds A and B will compare. (2) 6.5 From the table above, the boiling point of the carboxylic acid in experiment 2 is higher than the boiling point of the carboxylic acid in experiment 1. Explain this observation by referring to the molecular structure, intermolecular forces and energy. (3) [10] Copyright reserved Please turn over

10 Physical Sciences NSC March 2025 Test QUESTION 7 (Start on a new page) Study the flow diagram below. An organic compound Z is produced from compound X using reactions | and II. H | H—C—H Hl 4 H | ‘ Reaction | Compound Y H-o-c-¢_t_6 CH yn C*8| CH2CHCH2C(CHs)2CHs | | | | H2SOs (conc.) H H H | H H-C_H Br, |RReaction Il | H Compound X Dihaloalkane Compound Z 7.1. NAME the functional group of compound X. (1) 7.2 Write down the IUPAC name of compound X. (3) 7.3 NAME the homologous series of the organic product that would be produced if compound X were now treated with a carboxylic acid in the presence of hot, concentrated sulphuric acid. (2) 7.4 Identify the homologous series of compound Y. (1) 7.5 NAME the type of addition reaction represented by reaction Il. (1) 7.6 Using STRUCTURAL formulae, write down the balanced chemical equation for reaction Il. (3) [11] TOTAL: 100 Copyright reserved

Physical Sciences 11 NSC March 2025 Test DATA FOR PHYSICAL SCIENCES GRADE 12 GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 TABLE 1: PHYSICAL CONSTANTS / TABEL 1: FISIESE KONSTANTES NAME / NAAM SYMBOL / SIMBOOL VALUE / WAARDE Acceleration due to gravity g 9,8 m-s? Swaartekragversnelling Universal gravitational constant G 6,67 = 10° N-m2-kg2 Universele gravitasiekonstante Speed of light in a vacuum c 3,0 x 108 m-s1 Spoed van lig in 'n vakuum Planck’s constant h 6,63 x 104 J-s Planck se konstante Coulomb’s constant k 9,0 x 109 N-m?2-C-2 Coulomb se konstante Charge on electron e -1,6 x 1079C Lading op electron Electron mass Me 9,11 x 10°" kg Elektronmassa Mass of Earth M 5,98 x 1074 kg Massa van Aarde Radius of Earth Re 6,38 x 10° m Radius van Aarde TABLE 2: PHYSICAL CONSTANTS/TABEL 2: FISIESE KONSTANTES Avogadro-konstante NAME/NAAM SYMBOL/S/IMBOOL VALUE/WAARDE Standard pressure p® 1,013 x 10° Pa Standaarddruk Molar gas volume at STP Molére gasvolume by Vim 22,4 dm?-mol" STD Standard temperature Standaardtemperatuu T 273K r Charge on electron e -1,6 x 10°79C Lading op elektron Avogadro's constant Na 6,02 x 102° mol Copyright reserved Please turn over

Physical Sciences 12 NSC March 2025 Test TABLE 3: PHYSICS FORMULAE / TABEL 3: FORMULES MOTION / BEWEGING Ve =Vj+adt Ax = v,At 4 aAt or/ofAy = v,At+}aat? v,° =v,° + 2aAxor/ofv,” =v,’ + 2aAy Ax =(% 5 fatorotay ("5 Jae FORCE / KRAG Fret =ma p=mv fs(max) = UsN fk = ukN FnetAt = Ap w=ng Ap = mvs - mvi Gm,m Gm F=—3— Fr WORK, ENERGY AND POWERIARBEID, ENERGIE EN DRYWING W =FAxcosé U=mgh orof E,=mgh W,e: =AK or/of = W,,, = AE, K = 4m? or/of E,=3nv? : : x AK=K,-K, or/of AE, =E, -E, W,, =AK +AU or/of W,, = AE, +AE, pW At Pave = FVave / Pgem = FVgem Copyright reserved Please turn over

13 Physical Sciences NSC March 2025 Test TABLE 4: CHEMISTYRY FORMULAE/TABEL 4: CHEMIE FORMULES m N n=— n=-— M Na n m _Vv cay or/of C=ray my Sava De H = -log[Hs0"] Ov, pres seats Kw = [H3O*][OH] = 1 x 10° at/by 298 K @ _e C) @ _pfe e Eee ~ E cathode ~ E node IES, ~ E jatode ~ E anode or/of ) 8 ) 8 C) C) een = E reduction ~ E oxidatior/ Es = Ereduise — E orcidase or/of e@ _fe 6 6 _ fe 8 Eee = E oxidisingagent — E reducingagent / Esai ~ Eo reideermiddel ~ E ecuseermiddel where n is the number of electrons/ Q n 2 waar n die aantal elektrone is At e Copyright reserved Please turn over

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