Physical Sciences Grade 10 Limpopo March Test 2022 QP & Memo

KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE [ GRADE 10 ] II II II II II II II II 11_,,.., ,.__.,, II II II II II II 1• � " II ��!!!!!!!!! !! MARKS: 75 Oe TIME: 11/, hour � o?j 00 * This question paper consists of 11 pages.

INSTRUCTIONS AND INFORMATION 1. This question paper consists of SIX questions. Answer ALL the questions in the ANSWER BOOK. 2. Number the answers correctly according to the numbering system used in this question paper. 3. Leave ONE line between two sub-questions, for example between QUESTION 2.1 and QUESTION 2.2. 4. You may use a non-programmable calculator. 5. You may use appropriate mathematical instruments. 0 6. YOU ARE ADVISED TO USE THE ATTACHED DATA SHEE1S,:-C:,• 7. Show ALL formulae and substitutions in ALL calculations. 8. Round off your FINAL numerical answers to a minim'@'<;'TWO decimal places. 9. Give brief motivations, discussions, et cetera where required. �,S-v 10. Write neatly and legibly. Copyright reserved Please turn over

s Common Test March 2022 Phy i QUESTION 1: MULTIPLE-CHOICE Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write down only the letter (A-D) next to the question number (1.1 - 1.5) in the answer book, for example 1.6 D. 1.1 Which ONE of the following regarding thermal conductivity and electrical conductivity in most metals is TRUE? THERMAL ELECTRICAL CONDUCTIVITY CONDUCTIVITY Gooa Bad . ���� Bad _ • .• • (2) 1.2 Temperature is defined as a measure of the ... of the paftic�ps of a substance. A average kinetic energy B kinetic energy C potential energy D internal energy (2) 1.3 -., How many valence electrons does heJ:i_um• have? A O B 1 C 2 D 3 (2) 1.4 Which ONE of the Jo�ng substances does NOT have a simple molecular stru '(j� � A SLIIP.t\� B @arl'.mn dioxide C �'l?ssium bromide D water (2) 1 .5 A neutral object becomes positively charged when... A protons are removed from it B electrons are removed from it C protons are added to it D electrons are added to it (2) [10] Copyright reserved Please turn over

QUESTION 2 Given the following information, answer the questions that follow. A. Plastic B. Sulphur C. Boron D. Mercury E. Aluminium F. Magnesium nitrate G. 1 Air I 2.1 Explain why substance A cannot be used to make a needle of a compass. (1 ) 2.2 Which substance: 2.2.1 Can be hammered into thin sheets (1) 2.2.2 Is a liquid at room temperature and is also a good conductor of electricity (1) 2.2.3 Is a metalloid ( 1) 2.3 Write down the chemical formula for F. ( 2) 2.4 Is air a good thermal insulator? Choose from YES or NO. ( 1) 2.5 Identify the substance that is brittle. ( 1) [8] Copyright reserved Please turn over

Common Test March 2022 QUESTION 3 Grade 10 learners conducted an experiment to determine the heating curve of water at standard pressure by using crushed ice. The experiment was set up as shown below. 3.1 Define the term boiling point. (2) 3.2 Name the apparatus labelled X. (1) 3.3 How does placing a wire gauze on top of apparatus X assist with the heating process? (1) 3.4 The graph below shows the results obtained. 100 Temp (OC) -20 3.4.1 Can diffusion occur between to and t1? Choose from YES or NO. Explain the answer. (2) 3.4.2 Will the potential energy between t1 and 12 INCREASE, DECREASE or REMAIN THE SAME? (1) Copyright reserved Please turn over

3.4.3 Give a reason why the forces of attraction between the particles at point P are LESS THAN the forces of attraction between particles at point Q. (1) 3.4.4 Name the process taking place between times b and k ( 1) 3.4.5 Another experiment was conducted under similar conditions where the amount of ice used was now DOUBLED. How will this affect the readings on temperature axis of the graph? Choose from: INCREASES, DECREASES or REMAINS THE SAME (1) [10] QUESTION 4 4.1 Define the term relative atomic mass. (2) 4.2 In nature, neon has the following common isotopes only. Isotopes Abundanc�. (� 20Ne 90,00 21Ne 0,27 22Ne X 4.2.1 Write down the value of x ( 1) 4.2.2 Calculate the relative atomic mass of neon. (3) 4.3 Complete the table below for Af and Ca 2+. Write down ONLY the question number (4.3.1 and 4.3.2) and next to it the answer in the answer book. Number of Protons Number of Electrons Number of Neutrons 27Af 13 13 (4.3.1) -- 4oca2+ 20 (4.3.2) 20 (2) 4.4 Write down the electron configuration notation (sp notation) for the phosphide ion. (2) 4.5 What is the name given to the group 17 (group VII) elements? (1) Copyright reserved Please turn over

uowr11ua ded ,.& Physi�I ..S.c;,i�.ri.§.s Common Test March 2022 4.6 The graph below shows the first ionization ener gies of elements from Period 3 of the Periodic Table. >, ,._ 0) Q) C: C: 0 C: 0 Na Mg Al Si P S Cl Ar Period 3 Element Explain why the first ionization energies generally increases from Na to Ar. (3) [14] QUESTION 5 5.1 Define the term covalent bond. (1) 5.2 Refer to the Lewis dot diagrams of the 3 elements below . •• •• •• . 0: • s: • N•• • • • 5.2.1 Draw the Lewis dot diagram for the oxygen molecule. (2) 5.2.2 Draw the Lewis dot diagram for ammonia. (2) 5. 2.3 What is the valency of sulphur? (1) 5.3 During the formation of sodium chloride a crystal lattice is formed. 5.3.1 Draw a sketch to show the arrangement of ions in the lattice. ( 1) 5.3.2 Identify the cation. (1) 5.3.3 Draw the Lewis dot structure for the NaCl formula unit. (2) [10] Copyright reserved Please turn over

... ._ -'- QUESTION 6 A small neutral metal sphere, A, is rubbed with a woollen cloth until it acquires a charge of -3,2 µC. The sphere is then placed on an insulated stand. -3,2 µC 6.1 Name the process by which sphere A became charged. (1) 6.2 Why must the metal sphere be placed on an insulated stand? (2) 6.3 Determine the number of excess electrons on sphere A. (3) 6.4 The charge that sphere A acquired is in keeping with the principle of quantization of charge. Explain this statement. (2) Sphere A is now placed CLOSE to an identical but UNCHARGED sphere B. Both are still on insulated stands. -3,2 µC UNCHARGED 6.5 What is meant by sphere Bis uncharged? (2) The two spheres are now allowed to TOUCH each other and they are then separated. 6.6 In which direction did charges move on touching? Choose from: A to B or B to A. Give a reason for the answer. (2) 6.7 Calculate the new charge on each sphere after touching. (3) 6.8 State the definition of the principle on which your answer to QUESTION 6.7 is based. (2) Copyright reserved Please turn over

Common Test March 2022 A learner now hangs a polystyrene ball, C, by a thin piece of string near sphere B as shown below. Ball C experiences a FORC E to the RIGHT as shown below. 6.9 Is ball C POSITIVELY or NEGATIVE LY charged? (1) 6.10 Define the term polarization . (2) Another polystyrene ball, D, hanging by a thin piece of string, is placed NEAR ball C as shown. Ball Dis UNCHARGED. 6.11 What happens to ball D? (Choose from: MOVES TOWARDS C; MOVES A WAY FROM C or R EM AI NS ST ATIONARY) (1) 6.12 Draw a sketch to show the arrangement of the charges on sphere D. (2) [23] Copyright reserved Please turn over

DATA FOR PHYSICAL SCIENCES GRADE 10 (PHYSICS) GEGEWENS VIR FIS/ESE WETENSKAPPE GRAAD 10 (FIS/KA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FIS/ESE KONSTANTES NAME/NAAM SYMBOUS/MBOOL VALUEIWAARDE Electron charge qe -1 ' 6 X 10-19 C TABLE 2: FORMULAE/TABEL 2: FORMULES ELECTROSTATICS Copyright reserved

7J if :::r '< TABLE 3: THE PERIODIC TABLE OF ELEMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (I) (II) (Ill) (IV) (V} (VI) (VII) (VIII) 1 Atomic number 2 KEYISLEUTEL Atoomgetal �- H He 1 l 4 29 Electronegativity � Cu Symbol 3 4 5 6 7 8 9 10 " .,.: LI :- Be c:i Elektronegatiwiteit...+.... 63,5 +- Simbool � B � C �- N �o � F 16 19 Ne 7 9 12 11 14 20 11 12 , 14 13 15 16 17 18 � Na � Mg Approximate relative atomic mass l�Ae .,.: s·I � p � s � ce Ar 00 23 24 Benaderde relatiewe atoommassa 27 28 31 32 35,5 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 6 K � Ca � Sc .,..- T'I � V �- Cr �Mn �Fe :-co .,.: N"I �-Cu �Zn �Ga �Ge �-As �- Se � Br I() co Kr --- 39 40 45 48 51 52 55 56 59 59 63,5 65 70 73 75 ... . 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 ..,, 6 Rb � Sr � y ! Zr Nb :-Mo :- re � Ru �Rh � Pd 'Ag �Cd � In �Sn :- Sb � Te N I Xe 86 88 89 91 92 96 101 103 106 108 112 115 119 122 128 127 131 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 6 Cs � Ba La � Hf Taj w Re Os Ir Pt Au H g � Te �Pb .,.: B"I � Po � At en Rn 133 137 139 179 181 184 186 190 192 195 197 201 204 207 --209 0 0 87 88 89 3 3 6 Fr CJ?. Ra 0 Ac 58 59 60 61 62 63 64 65 66 67 68 69 70 71 0 ::J 226 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu -l CD 140 141 144 150 152 157 159 163 165 167 169 173 175 � !ll 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa u Np Pu Am Cm Bk Cf Es Fm Md No Lr N 0 N 232 238 N - --�--�---�- --

KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CER TIFICATE ( GRADE 10 ] � �-----------------------------------------� � i': II PHYSICAL SCIENCES •�, II II II II MON TES T II II II II .,.., II II II II II II II II II MARKING GUIDELINE II II ,,�� II ����"""""·�-------------------------------� � #/ MARKS: 75 This marking guideline consists of 6 pages.

Common Test March 2022 QUESTION 1: MULTIPLE- CHOICE 1.1 B✓✓ (2) 1.2 A✓✓ (2) 1.3 A✓✓ (2) 1.4 C✓✓ (2) 1.5 B✓✓ (2) [10] QUESTION 2 2.1 It is not magnetic✓ ( 1) 2.2.1 Aluminium / E ✓ ( 1) 2.2.2 Mercury ✓ (1) 2.2.3 Boron /C ✓ (1) 2.3 Mg(N03 )2✓✓ (2) 2.4 Yes✓ (1) 2.5 Sulphur /B ✓ (1) [8] Copyright reserved Please turn over

Common Test March 2022 QUESTION 3 3.1 • The temperature of a liquid ✓ • at which its vapour pressure equals the atmospheric pressure✓ (2) 3.2 Tripod stand ✓ (1) 3.3 Ensures an even distribution of heat✓ OR Prevents the glass beaker from cracking ✓ (1) 3.4.1 • No ✓ • The water is in the solid phase ✓ (2) 3.4.2 Increase ✓ (1) 3.4.3 The water is in the gaseous phase ✓ (1) 3.4.4 Evaporation ✓ (1) 3.4.5 Remains the same ✓ (1) [10] Copyright reserved Please turn over

Common Test March 2022 QUESTION 4 4.1 The mass of particle on a scale where an atom of carbon -1 2 has a mass of 12 ✓✓ (2 ) 4.2.1 100 - ( 90 + 0, 27 ) = 9, 73 % ✓ (1 ) 4.2.2 Positive marking from 4.2.1 90 x 0 27 x 9 73 x A (Ne)=( 2 0 ) +( • 21)+( • 2 2) R 100 100 100 ✓✓ (3 ) = 2 0, 2 0 ✓ 4. 3.1 14 ✓ 4. 3 .2 18 ✓ (2 ) 4.4 ls 2 2s2 2 p6 3s2 3 p6 ✓✓ (2 ) 4.5 Halogens ✓ (1 ) 4.6 • From left to right atomic number increase_causing an increase in the nucleus charge✓ • This causes the atomic radius to decrease leading to a stronger force of attraction on the outer electrons ✓ • More energy is required to remove an electron from the atom ✓ (3 ) [14] QUESTION 5 5.1. Sharing of electrons between atoms to form a molecule. ✓ (1) 5. 2.1 ✓✓ (2 ) 5.2.2 H X• ✓✓ (2 ) H X • • N• ·x H 5.2.3 2 ✓ (1 ) Copyright reserved Please turn over

Common Test March 2022 5.3.1 ✓✓ (1) + 5.3.2 Na ✓/sodium ion (1) 5.3.3 ✓✓ (2) [10] QUESTION 6 6.1 Tribo-electric charging ✓ (1) 6.2 To prevent the excess electrons from moving into the earth/ground ✓✓ (2) 6.3 ✓ n=- Qe 3,2x10-6 ✓ 1 6 x10-19 = 2x1013 ✓ (3) 6.4 It consists of an +nteger / whole number multiple of the charge on one (2) electron. ✓ ✓ 6.5 Number of electrons equals number of protons. ✓✓ ( 2) 6.6 A to B✓. A has excess electrons✓ ( 2) 6.7 =Q1 +0 2 ✓ Q new 2 (-3,2x 10-6: = ✓ 2 =-1,6 X 10-6 ✓ (3) Copyright reserved Please turn over

Common Test March 2022 6.8 • The net charge in an isolated system ✓ • remains constant (during any physical process) ✓ (2) 6.9 Negatively ✓ (1) 6.10 • The partial or complete polar separation ✓ • of positive and negative electric charge in a system ✓ (2) 6.11 Towards C ✓ (1) 6.12 ✓✓ (2) [23] Copyright reserved