Physical Sciences Grade 12 KZN March 2022 Memo

Physical Sciences NSC March 2022 Common Test INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. 2. This question paper consists of SEVEN questions. Answer ALL the questions in the ANSWER BOOK. 3. Start EACH question on a NEW page in the ANSWER BOOK. 4. Number the answers correctly according to the numbering system used in this question paper. 5. Leave ONE line between two sub questions, for example �etween QUESTION 2.1 and QUESTION 2.2. 6. You may use a non-programmable calculator. 7. You may use appropriate mathematical instruments. 8. You are advised to use the attached DATA SHEET§>, 9. Show ALL formulae and substitutions in ALL ca2ilations. 10. Round off your final numerical answers�� minimum of TWO decimal places. 11. Give brief motivations, discussions ef?etera where required. 12. Write neatly and legibly. "'Q Copyright reserved Please Turn Over

March 2022 Common Test QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A-D) next to the question number (1.1-1.6) in the ANSWER BOOK, for example 1.11 D. 1.1 According to Ne ton's Second Law of Motion, the acceleration of an object is ... r A ways equ,I to its mass. · B versely proportional to its mass. • .• , I ......,.____,e-directly--proportional to its mass. D independent of its mass. (2) 1.2 A ball, moving horizontally, hits a wall with a speed 2v. Th�}i(then bounces back horizontally with a speed v, as shown in the diagra� i:(e1ow. • .. _. 2v +--v - • Which ONE of the followin9 cc@.binations regarding the linear momentum and the total kinetic energy of the ball for the collision above is CORRECT? Assume that the ba ll-wfi system Is IsoI ated 'l. LINEAR MOM-F,fffUM KINETIC ENERGY A -- �--·· Consewed Conserved - ---· -�- - �(0'0nserved · .0.. . ------- -- -•-'••. v ..,..____ ��--�----·�- 73·-· Not conserved -'� --�s. --•�mN,r•••••�. C ....L Not conserved Conserved iV D Not conserved Not conserved (2) 1.3 An object falls freely in a vacuum near the surface of the Earth. Which ONE of the following statements regarding the motion of the object is CORRECT? A The rate of change of velocity of the object will remain constant. B The rate of change of velocity of the object will increase uniformly. C The velocity of the object will decrease uniformly. D The velocity of the object will remain constant. (2) Copyright reserved Please Turn Over

Downloaded from Stanmorephysics.com education Department: Education PROVINCE OF KWAZULU-NATAL NATIONAL SENIOR CERTIFICATE GRADE 12 This marking guideline consists of 7 pages. MARKS : 100 Copyright Reserved Please turn over

Physicaldeanetoaded from Stanmorephysics.com March 2022 Common Test SC QUE 14 1:2 1.3 1.4 Cyvv 1.5 Byv 1.6 Dvv (6x 2) =12 QUESTION 2 2.1.1 When a resultant/net force acts on an object, the object will accelerate in the direction of the force at an acceleration directly proportional to the force“ and inversely proportional to the mass of the object. v OR The resultant/net force acting on an object is equal to the rate of change of (2) momentum of the object in the direction of the net force. YY (2 or 0) 21.2 FrormalY FrormalY Friction” OR Friction Fx Fv Fgravity¥ anne ey (4) 2.1.3 Fnet=ma v N=Fg + Fy N = ((4x9,8) + 10Sin30°)v N = 44,20 Nv (3) 2.1.4 Fnet = ma Fn-—Fr =ma } i 10Cos30° v—2 = 4av a=1,67 ms?v (4) Copyright Reserved Please turn over

Physicaleanesoaded from Stanmorephysics.com March 2022 Common Test SC 2.1.5 DECREASESY (1) 2.1.6 INCREASESY The horizontal component of the applied force increasesv and the frictional force decreases. ¥ (2) 2.2.1 State Newton's Law of Universal Gravitation: Each body in the universe attracts every other body with a force that is directly proportional to the product of their massesY and inversely proportional to the square of the distance between their centres. ¥ (2) Note: Underlined phrases must be in context of the law 2.2.2 M g=Gav r = 6,67 x10" .5,98x 10% v (6,38 x 10°)? v = 9,799 N.kg+(m:s*) v (9,8 ms) Note: if only 9,8 m:s* written then 1/4 marks (4) [22] QUESTION 3 3.1 In an isolated system, V the total linear momentum remains constant (2) (is conserved). ¥ [first mark awarded only if it is in context of momentumconservation] 32 Xpi = Xpr Maviat Mavi2 = Miver + Ma2vi2 “ (1500)(0) + (2000)(20) v= (1500)(12) + (2000)vi2 v v2=11 mst v (4) OR (1500)(0) + (2000)(—20) v= (1500)(—12) + (2000)vi2 ¥ vi2=—11m:s? Hence speed =11 mst v 3.3 The driver moves (momentarily) forward. v (1) 3.4 Newton’s first Law v OR Inertia (1) [8] Copyright Reserved Please turn over

Physicaldeanesoaded from Stanmorephysics. com March 2022 Common Test SC QUESTION 4 4.1 Motion during which the only force acting on an object is the gravitational force. VW (2) 4.2 The object is projected upwards from above the ground V / the top of a building. It then moved downwardsv below the starting position / top of the building. W (3) 4.3 OPTION 1 OPTION 2 OPTION 3 vi=vi+ atv vi=vi + adtv Grad = 9,8 v= was o 0 = vi + (9,8)(0,25) v 0=vi + (—9,8)(0,25) v ; vi = — 2,45 ms" vi = 2,45 mst upwardsY | vi = —2,45 ms? een it 4! ‘s+ upwa v vi= 2,45 ms? upwardsv " Sms “upwards (3) 44 POSITIVE MARKING FROM Q 4.3 OPTION 1 OPTION 2 OPTION 3 Vi = vi + atv vi = vi + atv Grad = 9,8 v= i = ee vr=0 + (9,8)(4-0,25)¥ | w=—2,45 + (9,8)(4 )v 4 ‘ vi = 36,75 ms? downward” | vi = 36,75 ms downwardv vo SB Tore threneaul (3) 45 4 E 5 CRITERIA MARK = Correct shape v & Indications of the times | ¥ 3 Zé Graph starts from origin | ¥ t(s) v (3) [14] Copyright Reserved Please turn over

PhysicalSeanesoaded from Stanmorephysics.com QUESTION 5 5.1.1. ester”; accept alkyl alkanoate 5.1.2 Propylv butanoatev 5.1.3. Carboxylic acidv; accept alkanoic acid 5.2 A bond or an atom or a group of atomsv that determine(s) the physical and chemical March 2022 Common Test properties of a group of organic compounds. v 5.3 Carboxyl (group) ¥ 5.4 5.5 Organic molecules with the same molecularv formula but different structural formula. ¥ 5.6.1 Secondary v The carbon to which the hydroxyl group is bonded, is bonded to TWO other carbonsY 5.6.2 H H H | | | Bi eee ta nek SG | | | H H fe) | H Functional group on correct carbonY Whole structure correctY Copyright Reserved Qs" aL = cies Gare nels Please turn over (1) (1) (2) (1) (1) (2) (2)

Physicaldeanesoaded from Stanmorephysics.com oy es. ee aL = .9¢ Sa | (p iiesat 5 x OR H H | | Cr 2350) ==0H | | H H 5.7.1 Organic compounds that consist of carbon and hydrogenY ONLYY O32 Copyright Reserved ae Seat © {e) 2s als Soe) ECS) SE | fe) H Cc — H H H Cc — C — C€C — H H H H MARKING CRITERIA ¢ 6 Carbon parent chain v ¢ 3 methyl groups on parent | ¥ chain e Whole structure correct v Please turn over March 2022 Common Test (2) (2) (3)

Physicaldeanesoaded from Stanmorephysics. com March 2022 Common Test SC [19] QUESTION 6 6.1 The temperature at which the vapour pressure equals atmospheric/external pressure. ¥v (2 or 0) (2) 6.2 Zv- Z has the highest boiling point. ¥ (2) 6.3 Xv (1) 6.4 What is the relationship between boiling point and type of functional group/ homologous series? Identify dependent variable Identify independent variable Y (If answer not stated as question -1 mark) (2) 6.5 To ensure a fair test. / to control the variable (1) / to ensure there is only one independent variable ¥ 6.6.1 (DO NOT MARK) 6.6.2 (DO NOT MARK) UPSCALE MARKS TO BE OUT OF 13 USING TABLE: Mark out of 8 | Conversion out of 13 ab 2 2 3 3 5 4 it. 5 8 6 10 7 11 8 13 [13] QUESTION 7 7.1.1. Addition/hydrogenation V (1) 7.1.2 Elimination/dehydrohalogenation ¥ (1) 7.2.1 Dehydration Vv (1) 7.2.2 Hydrohalogenation ¥ (1) 7.3.1 Hydrolysis ¥ (1) 7.3.2 (Mild) heat v Copyright Reserved Please turn over

Physicaldeanesoaded from Stanmorephysics.com March 2022 Common Test Sc Dilute strong base/NaOQH/KOH ¥ (2) 7.4 Concentrated strong base/NaQH/KOHY (1) Wao) CHsCHCHCH3 ¥ + HzO ¥Y ——» CHsCHOHCH2CH3¥” BAL ¥ OR CH2CHCH2CH3 ¥ + H20 Y¥ -——» CHsCHOHCH2CH3Y BAL ¥ (4) [12] Copyright Reserved Please turn over