Physical Sciences Grade 11 KZN September Test 2022 QP & Memo

EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE PHYSICAL SCIENCES COMMON TEST SEPTEMBER 2022 TIME: 2 hours MARKS: 100 This question paper consists of 11 Pages, two data sheets and one graph sheet.

Physical Sciences D own loaded fro m h layisg..¢ QWMNeommon Test Downloaded from StalfinGPéptiysics. com INSTRUCTIONS AND INFORMATION TO CANDIDATES 4. Write your name 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 thigeQuestion paper. ew) 5. Leave ONE line between two subsections, for example between, (? QUESTION 2.1 and QUESTION 2.2. A\ 6. You may use a non-programmable calculator. Ry 7. You may use appropriate mathematical instuments 8. You are advised to use the attached DATA SHEE ; g. Show ALL formulae and substitutions in ALL calculations. 40. Round off your final numerical XO ‘0 a minimum of TWO decimal places. 11. Give brief motivations, discussions, et cetera where required. oe Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Physical Sciences September 2022 Common Test Downloaded from Stanmopephysits.com QUESTION 1 : MULTIPLE CHOICE QUESTIONS 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, for example 1.7 D. 1.1 The north pole of a magnet is moved into a coil consisting of 20 turns of insulated conducting wire. Which ONE of the following changes will INCREASE the induced emf? A _ Increasing the time taken for the magnet to move into the coil. & B Decreasing the number of turns in the coil. ew) C Moving the south pole of the magnet into the coil. o: D Increasing the speed at which the magnet is moved into whee (2) 1.2 In the circuit below, the four bulbs P, Q, R and S are ent oo &) Which ONE tong pairs of bulbs has equal brightness? A Ss and B QandR C PandQ D QandS (2) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com PhysiFg! Sciences oWildaded from Stanmerepbysics.com September 2022 Common Test 1.3 The circuit diagram below shows two bulbs A and B connected in series, a battery, an ammeter, and a voltmeter connected across resistor B. The battery, ammeter and conducting wires have negligible resistance, while the voltmeter has very high resistance. How will the readings on the ammeter and the voltmeter change if the resistance of the bulb B increases, while that of bulb A remains the same? Ammeter Voltmeter A | Increases Decreases B | Decreases Decreases C | Remains the same Increases D | Décreasés Increases (2) 1.4. Which ONE of the following combinations of acids represent a polyprotic and a monoprotic acid respectively? A H2SO4 and H3PQO.4 B H3PO4 and HNO3 Cc H20 and H2CO3 D CHsCOOH and HNO3 (2) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com September 2022 Common Test Physical $ 5 : Downloaded from Stanmexepkysics.com 4.5 Which ONE of the following graphs CORRECTLY represents the deviation of a real gas from ideal gas behaviour? A B p p iv iN Cc D p p In (2) 1.6 The decomposition of water can be represented by the following chemical equation: 2H,0 (g) ———* 2H(g) + O2(g) AH = +571,8 kJ-mol" What is the heat of reaction for the formation of the two moles of H2? A +571,8 kJ B -571,8 kJ C -1143,6 kJ D +1143,6 kJ (2) [12] Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Physi5a ded from Stanngcephysics. com September 2022 Common Test QUESTION 2 The diagram below shows a bar magnet that is dropped vertically downwards into a stationary coil. The direction of the current induced in the coil is shown. 2 2.1 ,StateFaraday's law of electromagnetic induction in words. (2) ) aaa () ar | 2.2 Determine the polarity of the bar magnet at X. Choose from NORTH POLE or SOUTH POLE. (2) 2.3 What is the polarity of the coil at Y as the bar magnet exits the coil? Choose from NORTH POLE or SOUTH POLE. (2) [6] Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Si i September ommon ‘Downloaded from Stanmorephysies.com prember 2022.0 Tes QUESTION 3 A group of learners carried out an experiment to verify Ohm’s law. The following components were used: A battery, a resistor R of unknown resistance, a rheostat, an ammeter, a voltmeter, a switch and conducting wire. 3.1. State Ohm’s law in words. (2) 3.2 Sketch a circuit diagram to show how the above apparatus should be connected for this investigation. (4) 3.3. Five readings were taken, indicated by the five points plotted in the graph below. Current vs Potential difference » a Current (A) nN on & wo = 0 0.5 1 1.5 2 2.5 3 Potential difference(V) 3.3.1 What is the mathematical relationship between current strength and potential difference? (1) 3.3.2 Is the graph drawn correctly? Give a reason for the answer. (2) 3.3.3. Calculate the resistance of resistor R using the graph. (2) 3.3.4 What physical quantity does the product of the current and the potential difference represent for any point on the graph? Oy Copyright Reserved Please Turn Over

Downloaded from hlayiso.com September 2022 Common Test Posi 6Wildaded from Stanwesephysics.com QUESTION 4 In the circuit below, the emf of the battery is unknown and its internal resistance is negligible. Four resistors, Ri, R2, Rs, and R4 are connected as shown in the diagram. The resistance of Ri, R2, and R3 are 3,5 Q, 3. O and 100 respectively, and the ammeter reads 1,25 A. The resistance of R4 is unknown. —Or-|1 Ry 1,25 A 302 _(m) R2 100 Ra (v) YY 4.1 Calculate the reading on: 4.1.1. voltmeter V 4.1.2 ammeter Az 4.2 1200 C of charge flows through resistor R; in 5 minutes. Calculate 4.2.1 The readingion ammeter As. 4.2.2 The resistance of resistor R4. 4.2.3 The emf of the battery. Copyright Reserved 3,50 (3) SES Please Turn Over

Downloaded from hlayiso.com Physical Sciences September 2022 Common Test Downloaded from Stanmssepaysics. com 4.3 Aniron is rated “230 V , 2200 W “* 4.3.1 What information about the iron does the rating “2200 W” provide when it is connected to a 230 V source? (2) 4.3.2 If the iron is connected to a 220 V source for 30 minutes, calculate the amount of electrical energy transferred to the iron. (5) 4.3.3 If the cost of electricity is R 2,56 per kWh, calculate the cost of using the iron for 30 minutes. (3) [25] QUESTION 5 An investigation was done to determine the relationship between volume and pressure of a fixed mass of dry gas. The table below shows the results of the investigation. Volume(cm’*) | Pressure(kPa) pV 5 25,0 125 10 12,5 125 13 10,0 130 20 6,25 125 25 5,0 125 30 4,20 126 35 3,50 123 5.1. NAME and STATE in words the law being investigated here. (3) 5.2 Write down an investigative question for this investigation. (2) 5.3 Apart from the mass of gas, what other physical quantity must be kept constant (1) during this investigation? 5.4 Use the attached graph paper on page 14 to draw a graph of VOLUME versus PRESSURE for the gas. (4) 5.5 The product of the pressure and volume (pV) for each reading is approximately constant. Show that the unit for pV is the JOULE. (3) 5.6 When the pressure is extremely high, the pressure-volume relationship deviates from the law referred to in Question 5.1. (3) Explain.why this deviation occurs. 5.7 Caleulate the pressure exerted by the gas when the volume of the gas is increased to 45 cm*. (3) [19] Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Physical Sciences 40 . September 2022 Common Test Bownloaded from Stanmarepkysics.com ommon Tes QUESTION 6 Cold packs and Hot packs are commonly used to treat injuries to reduce swelling in muscles. Study the reactions taking place in the packs, and the graph below and answer the questions that follow. Cold pack: NH4NOs(s) +H20 ——* NH,"(aq) + NOs3‘(aq) Hot Pack: 4Fe(s)+302(g) ———+ 2Fe,03 (s) ay nase ——— ao 60 50 40 I r atl 30 Energy (KJ) vi — eh 20 10 Extent of reaction 6.1 Define the term activation energy. (2) 6.2 Provide values from the graph for the following: 6.2.1 Activation energy for the reaction in the absence of a catalyst. (1) 6.2.2 Energy of products. (1) 6.2.3 AH (2) 6.3 Does the graph represent the reaction for the Hot pack or the Cold pack? Give a reason for the answer. (2) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com September 2022 Common Test Physical Scjence 11 - Downloaded from Stanmosephysics.com 6.4 Define a catalyst? (2) 6.5 The reaction mixture is heated. How will this affect the activation energy for the reaction at this higher temperature? Choose from INCREASES, DECREASES or NO EFFECT (1) [11] QUESTION 7 7.1 Phosphoric acid (H3PO,) reacts with water through the following three step reaction. Step 1. H3PO4 + H2O = H2PO4 + H30* Step 2. H2PO, + HO & HPO,” + H30* Step 3. HPOw + HO = PO,* + H30* 7.1.1. Why is H3PO, a Lowry-Bronsted Acid? (2) 7.1.2. Define the term ampholyte. (2) 7.1.3 Identify TWO substances that act as ampholytes in the reactions above. (2) 7.1.4 Write down ONE conjugate acid-base pair for step 2. (2) 7.2 Complete and balance the following reactions: 7.2.1. CH3COOH +NaQH ———> (3) 7.2.2 HCf + CaCO; —_ (3) [14] TOTAL MARKS: 100 Copyright Reserved Please Turn Over

Downloaded from hlayiso.com PrsieAGWifoaded from Stangerenbysics.com DATA FOR PHYSICAL SCIENCES GRADE 11 PHYSICS : FORMULAE : TABLE 1 September 2022 Common Test \-2 R= At I 1 1 R rn R=t+ Ib +fg+... W=Vq _Ww ~ At W=VIAt W=PRat P=VI ; P=PR We Viat Vv R R CHEMISTRY : FORMULAE : TABLE 2 DV, PV, abe 2 V=nRT TT P n=” n= M Ny n= cx" ORIOF ga V, V MV Copyright Reserved Please Turn Over

Downloaded from hlayiso.com September 2022 Common Test ephi 13 QE loaded from Stanm jence: ical Sc own Pris S6 Nd v6 ng £9 ws zg uy 98 S6L 4d gL z6L jl iL sO 9d eu GZ M ‘24 beh aX vs 901 Pdi ob £01 ua Sr 10 nes vb OL ey 96 io] OW & zy weSICS. COM v8 | oe 6s IN & 82 6s 09% lz 9s edz 92 sg UW 4 zs a) 4D & vz OF iy ED 0z ON OL G 9H z (A) SL (A) db 9b SL (al) tL (in) cs 4 jooquig”> joquids s‘e9 —_ ND © 6z JeyeBuiooyy * dequinu s1woyy 6 8 Z esseumluooje amayejes apsapeuag ssew d1W0}2 onion ayeuXxoiddy + yapmpeBauonye/z AytanjeGou0.399/3 TaLNATSIAI 9 s SLNAW313 40 ATV DIGOlAd SHL “€ FIAVL (W) z ( L Please Turn Over Copyright Reserved

Downloaded from hlayiso.com Physical Sci 14 . September 2022 C Test ‘Downloaded from Stanmexephysics.com “Pe emmon es NAME OF SCHOOL: NAME OF LEARNER : GR 11 QUESTION 5.4 ANSWER SHEET Copyright Reserved

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com } KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 11 NB: This marking guideline consists of 7 pages. Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test NSC-Grade 11 QUESTION ONE 11 Dvv 12 Avv 13 Dv¥vv 14 BYY 15 Cvv 16 Dvv [12] QUESTION TWO 2.1 |The magnitude of the induced emf across the ends of a conductor is directly proportional to the rate of change in the magnetic flux linkage with the conductor. v ” (2) 2.2 North/Nvv (2) 2.3 Positive marking from Question 2.2 Northy v (2) [6] QUESTION 3 3.1 The potential difference across a conductor is directly proportional to the current in the conductor vat constant temperature. Vv (2) 3.2 @ WA R : “Op Marking Rubric No | Criteria Mark 1__| All components included in diagram 1 2. | Ammeter connected in series to resistor R 1 3. | Voltmeter connected in parallel to R 1 4. | All components are connected correctly. 1 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test NSC-Grade 11 3.3.1 Directly proportional” (1) 3.3.2 Nov ,the line is not drawn through the average of the plotted points. (2) 3.4.3 1 Al RAV =27%y 1-0 R =0,5QV (2) 3.4.4 PowerY v (2) [13] QUESTION 4 4.1.1 V=LRY =1,25x3 V=3,75 VW (3) Positive marking from question 4.1.1 4.1.2 V 3,75 P= * I = 0,375 AY (2) 421 Q=IAt y 1200 =1-300V Il=4Ay (3) 4.2.2 Positive marking from Question 4.1 and 4.2 Ip = 4 =(1,25+0,375)V =2,375A R= V ~T p27, ~ 2375" = 1,58 0 /1,579 OW (4) 4.2.3 V=IR =4x3,5v =14V EMF N, + 3,75” x = 17,75 VW a) (3) Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. Ccsapiember 2022 Common Test NSC-Grade 11 4.3.1 2200 J of energy is dissipated by the iron per secondv v (2) 2 4.3.2 p Vey 5000 = 230” oR R = 24,045 Q v2 W=—AtY, 220? = v 24,046 (1800) = 3,62 x10® JV 6) 4.3.3. Energy used in kWh : 3,62 x10® J = 1,01 kWh Vv 1 kWh costs R 2,56 Cost of using the iron =1,01 x 2,56” =R 2,59 V (3) [25] Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test NSC-Grade 11 QUESTION 5 5.1 Boyles Law” (3) The volume of an enclosed mass of gas is inversely proportional to the presi exeR By the gas when the temperature remains constant. vv 5.2 i 1 ionship between volume and pressure for a fixed mass of gas.vv¥ (2) Marking criteria: e Identifying the two variables (pressure and volume). e Correctly phrased as a question. = 5.3. Temperature (of the gas)” 5.4 Graph of Volume vs Pressure ‘ 7 Volume(cm?) rey 3 19 1s 20 25 30 Pressure(kPa) Marking Rubric No | Criteria Mark 1 | All points correctly plotted 2 -1 if more than 2 points plotted incorrectly 2 | Volume on y-axis and Pressure on x-axis 1 3 _| Line of best fit curve drawn 1 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test NSC-Grade 11 5.5 Pressure x Volume =N.m?@v x mo v N.m Jv (3) 5.6 At very high pressure, the gas becomes less compressible. The volume occupied by the gas is so small that intermolecular distance between the molecules decreases. Thus an attractive force is observed between molecules and gas may become a liquid.” (3) 5.7 PiVi = P2V2V (3.5)(35)__= (P2)(45) ¥ 3.5)(35) P2)(45 (3) P2 = 2,72 cm8 Vv [19] QUESTION 6 6.1 The minimum energy needed for a reaction to take place. vv (2) 6.2.1 56kIY (1) 6.2.2 36 kIJv (1) 6.2.3 AH= Eproducts - Ereactants = 36-10 v = +26 kJv (2) 6.3 = Gold patky Energy is absorbed./ Reaction is endothermic/ AH > OV (2) 6.4 ~ Substance that speeds up the reaction” by decreasing the activation energy.” (2) 6.5 Noeffect v (1) [11] Copyright reserved Please turn over

Downloaded from hlayiso.com Physicsuemtsaded From Stanmorephysics. csapiember 2022 Common Test NSC-Grade 11 QUESTION 7 7.1.1 It is a proton donor. ¥v (2) 7.1.2. Is a substance that can act as an acid or a base. vv (2) 7.1.3 H2PO4 V and HPO ¥ (2) 7.1.4 HePOs and HPO vv (2) or H20 and H30* 7.2.1. CHs3COOH +NaOQH v ——> CHsCOONa + HO VY vbhal_ (3) 7.2.2 2HCl + CaCO3 ¥Y ——> CaCle + COz +H20v Ybal (3) [14] TOTAL MARKS: 100 Copyright reserved