Technical Sciences Grade 10 P2 Eastern Cape November 2019 QP

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE GRADE 10 NOVEMBER 2019 TECHNICAL SCIENCES P2 MARKS: 150 TIME: 3 hours *XTSCE2* This question paper consists of 16 pages, including a graph sheet and 2 data sheets.

Downloaded from hlayiso.com 2 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) INSTRUCTIONS AND INFORMATION 1. 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. You may use a non-programmable calculator. 5. LEAVE a line open between subsections, i.e. QUESTION 2.1 and QUESTION 2.2. 6. You are advised to use the attached DATA SHEETS. 7. Show ALL formulae and substitutions in ALL calculations. 8. Round off your final numerical answers to a minimum of TWO decimal places. 9. Give brief motivations, discussions, etc. where required. 10. Write neatly and legibly. Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 3 QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Choose the answers and write only the letter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, for example 1.11 E. 1.1 Which ONE of the following is considered as a non-metal property? A It conducts heat B It breaks easily C It has a dull colour D It conducts electricity (2) 1.2 Which ONE of the following is an element? A Ice B Salt C Water D Nitrogen (2) 1.3 A student has a container filled with iron pieces and plastic pieces. In order to collect the iron pieces, which of the following apparatus must be used? A Spoon B Paper C Tweezers D Bar magnet (2) 1.4 Given the following equation: ‫ ݃ܯ‬൅ ܱଶ ՜ ‫ܱ݃ܯ‬ Balance the equation if NOT balanced. How many Mg moles will react with O2? A 1 B 2 C 4 D 3 (2) 1.5 In which group on the periodic table will you find alkali metals? A Group 1 B Group 2 C Group 3 D Group 4 (2) Copyright reserved Please turn over

Downloaded from hlayiso.com 4 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) 1.6 Which ONE of the following defines heat? A It has mass B SI unit Joules C Is a form of energy D Indication of how hot or cold a body is (2) 1.7 An element that changes from an atom to ANION, when it accepts an electron. A Boron B Lithium C Nitrogen D Potassium (2) 1.8 The mass number of an element is the number of … A electrons. B protons and electrons. C protons and neutrons. D electrons and neutrons. (2) 1.9 The correct chemical formula for sodium carbonate is ... A Na2CO. B Na2CO3. C Na2CO2. D Na3 CO3. (2) 1.10 A good example of a semiconductor (metalloid) is … A silicon. B silver. C sulphur. D sodium. (2) [20] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 5 QUESTION 2 (Start on a NEW page.) A learner is in possession of four types of rings. Silicon Boron Nickel Copper 2.1 Which of the rings: 2.1.1 Are metals? (2) 2.1.2 Are semiconductors? (2) 2.2 Silicon is an example of a thermal insulator. Answer only YES or NO. (1) 2.3 Name TWO properties of non-metals. (2) 2.4 The copper ring is placed outside in open air and reacts with oxygen. Write down the BALANCED EQUATION for the reaction. (4) 2.5 Furthermore, the learner takes these rings with two other unknown materials (Material A and Material B) and d. The learner connects all these materials one by one in a circuit as shown below: A Materials Copyright reserved Please turn over

Downloaded from hlayiso.com 6 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) After the investigation is completed, the following results were obtained: MATERIAL CURRENT Nickel 0,6 Copper 0,8 Boron 0,2 Silicon 0,1 Material A 0,01 Material B 0,00 2.5.1 Which material is a WEAK conductor? (1) 2.5.2 Explain, what it means when material B has a zero reading. (2) 2.5.3 For this investigation, write down the controlled variable. (1) 2.5.4 What is the aim of this investigation? (2) 2.6 After the investigation has been conducted, the learner clears the desk and accidently puts all the materials together in one bag with iron and a second bar magnet. The learner was advised that all materials should be separated according to magnetic and non-magnetic. The learner uses a bar magnet to separate the materials. 2.6.1 Redraw the table below in your ANSWER BOOK. Write the relevant answer next to the material. MATERIALS REPELLED OR ATTRACTED Copper Silicon Boron Nickel Material A Material B Iron Second bar magnet (8 x 1) (8) 2.6.2 All the metals in this bag have magnetic properties. Write only TRUE or FALSE. (1) [26] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 7 QUESTION 3 (Start on a NEW page.) Carbon is an element that is found in abundance in the earth’s crust. Carbon is mainly used as coal and in diamond rings. 3.1 Define the following terms: 3.1.1 Element (2) 3.1.2 Valence electrons (2) 3.2 What is the NAME of the product formed when carbon is released in the atmosphere and reacts with oxygen? (2) 3.3 Write down the Aufbau-diagram of an OXYGEN ion. (3) 3.4 Which energy levels are core electrons situated in a structure of an atom? Write down ONLY the word, HIGHEST or LOWEST. (1) 3.5 Write down the number of valence electrons in a CARBON atom. (1) 3.6 Write down the spectroscopic electron configuration (s-p notation) for a CARBON atom. (3) 3.7 Consider the following isotopes of a carbon atom. ଺ ଺ ଺ ଵଶ‫ ܥ‬ଵଷ‫  ܥ‬ଵସ‫ܥ‬ 3.7.1 Define the term isotopes. (2) 3.7.2 Write down the charge of an electron in the atom. (1) 3.7.3 Write down the name(s) of the particle(s) that are found in the nucleus of an atom. (2) 3.7.4 Study the table below. Redraw the table in your ANSWER BOOK and write the relevant answers represented by (a) to (f). Isotope No. of neutrons No. of No. of protons electrons ଺ 6 ଵଶ‫ܥ‬ (a) (e) ଺ ଵଷ‫ܥ‬ (b) 6 (f) ଺ 6 ଵସ‫ܥ‬ (c) (d) (6) [25] Copyright reserved Please turn over

Downloaded from hlayiso.com 8 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) QUESTION 4 (Start on a NEW page.) Study the given key table for the following elements and use it to answer questions below. Element Key Element Key H Cℓ N Mg O 4.1 Define the following terms: 4.1.1 Compound (2) 4.1.2 Atomic number (2) 4.2 Draw structures of the molecules from the following compounds by using only the KEYS from the table. 4.2.1 H2 (2) 4.2.2 NH3 (2) 4.2.3 MgCℓ2 (2) 4.3 Catalytic converters are used to reduce air pollution. Study the diagram below by using the key table above. heat X + 4.3.1 Complete the equation given above by writing the structure of the KEY molecule formed represented by the letter X. (2) 4.3.2 Write down the balanced chemical equation by replacing the KEYS with ELEMENTS. (3) 4.3.3 Where does the gas that causes air pollution originate from? (2) 4.4 Write down the names of the following compounds: 4.4.1 CaCO3 (2) 4.4.2 FeO (2) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 9 4.5 Rewrite the following in your ANSWER BOOK and correct the chemical formulae, where necessary: 4.5.1 LiSO4 (1) 4.5.2 AℓOH (1) 4.6 Write the formula of the given compounds: 4.6.1 Magnesium oxide (2) 4.6.2 Copper (II) carbonate (2) 4.7 Complete and balance the following equations by writing chemical formulae: Ammonium ions + Phosphate ions ՜ (3) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 10 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) QUESTION 5 (Start on a NEW page.) A Grade 10 learner is given five different substances in a laboratory. The substances are labelled from Substance 1 to 5. Substance 1: Water Substance 2: Chlorine Substance 3: Beryllium Substance 4: Copper nitrate Substance 5: Sulphur dioxide 5.1 Define the term pure substance. (2) 5.2 Rewrite substance 1 to 5 in your ANSWER BOOK and next to it write whether the substance is an ELEMENT or a COMPOUND. (5) 5.3 Write down an equation by writing the chemical formula for the ions that are formed when substance 4 is dissolved in water. (3) 5.4 Redraw and complete the table with the use of the periodic table provided at the back of the question paper. Write the relevant answers next to the letters (a) to (f) given in the table. Substances Group number Period number Group name 2 (a) (c) (e) 3 (b) (d) (f) (6) 5.5 Here follows information regarding the contents of a 14 g rehydration sachet: CONTENTS 0,44 g Sodium chloride 0,38 g Potassium chloride 0,42 g Sodium bicarbonate 4,1 g Glucose 8,1 g Sucrose Mass: 14 g 5.5.1 Which names from the listed contents have common names? (2) 5.5.2 Write down the chemical formulae for potassium chloride. (2) 5.5.3 Identify the anion and cation in sodium chloride. (2) [22] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 11 QUESTION 6 (Start on a NEW page.) Here follows a graph of the boiling points of different substances. Two substances are unknown and are marked as Substance A and Substance B. Graph of boiling points of substances 1200 Mg, 1091 TEMPERATURE IN DEGREES CELSIUS 1000 Na; 892 800 600 400 K, 270 200 SUBTANCE A; 59 0 Cℓ2, -35 Ne, -246 -200 SUBSTANCE B; -400 -269 6.1 Which substance has the highest boiling point? (1) 6.2 Write down the chemical name of the substance with a boiling point of -246 degrees. (1) 6.3 What does it mean when substances read a negative boiling point? (2) 6.4 With the help of the attached periodic table, substance A and substance B were identified from the graph. Write down the name of: 6.4.1 Substance A, a non-metal with an atomic number of 35 (1) 6.4.2 Substance B, a gas that is lighter than light and used to fill balloons (1) 6.5 What is the GROUP NAME given to the elements Ne and Substance B where they are located on the periodic table? (1) [7] Copyright reserved Please turn over

Downloaded from hlayiso.com 12 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) QUESTION 7 (Start on a NEW page.) A lab assistant has been given the task to do an investigation to see which cup is the best insulator for boiling water. Two cups have been given to the assistant. Cup filled with tap water Beaker filled with Cup A water Hot plate x Water is placed into a large beaker and placed on a hot plate that is switched on at highest setting. x Cup A is filled with normal tap water and the initial temperature is taken. x The cup is placed inside the beaker. x A mass piece is placed in the cup. x Temperature readings are taken every 90 seconds and recorded on a table. x The same procedure is done for Cup B. The results are tabulated as follows: Time (in seconds) Temperature (in Ԩሻ Cup A Cup B 0 17 20 1,5 21 55 3 27 75 4,5 30 84 6 33 89 7,5 36 QUESTION 7.3.2 9 QUESTION 7.3.1 89 10,5 43 88 12 44 87 13,5 46 86 Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 13 7.1 Name the apparatus used to obtain readings on temperature(heat) and time. (2) 7.2 Calculate the difference in temperature in Cup A and Cup B using the following formula: οܶ ൌ ܶ௙ െ  ܶ௜ Where ܶ௙ is the final temperature ܶ௜ is the initial temperature. (4) 7.3 Studying the apparatus below. Write down the temperature readings in your ANSWER BOOK next to QUESTION 7.3.1 and QUESTION 7.3.2. 7.3.1 7.3.2 (2) 7.4 Convert the above temperature readings from degrees Celsius to Kelvin. (4) 7.5 Give the names of TWO other devices that are used to measure temperature. (2) 7.6 Use the attached graph paper to answer QUESTION 7.6. Draw a graph of Temperature against Time of cup A ONLY up to 7,5 seconds. (5) 7.7 In this investigation, what was the source of heat used to increase the temperature? (1) [20] TOTAL: 150 Copyright reserved Please turn over

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Downloaded from hlayiso.com 14 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT DATA FOR TECHNICAL SCIENCES GRADE 10 PAPER 2 (CHEMISTRY) GEGEWENS VIR TEGNIESE WETENSKAPPE GRAAD 10 VRAESTEL 2 (CHEMIE) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAAM/NAME SIMBOOL/SYMBOL WAARDE/VALUE Standard pressure pT 1,013 × 105 Pa Standaarddruk Molar gas volume at STP Vm 22,4 dm3∙mol-1 Molêre gasvolume teen STD Standard temperature Tθ 273 K Standaardtemperatuur Charge on electron e -1,6 × 10-19 C Lading op elektron Avogadro’s constant NA 6,02 × 1023 mol-1 Avogadro se konstante TABLE 2: FORMULAE/TABEL 2: FORMULES m N n= n= M NA n m V c= OR = n= V MV Vm p1V1 p 2V2 pV nRT T1 T2 Copyright reserved Please turn over

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(EC/NOVEMBER 2019) TECHNICAL SCIENCES P2 15 TABLE 3: THE PERIODIC TABLE OF ELEMENTS/TABEL 3: DIE PERIODIEKE TABEL VAN ELEMENTE 1 2 3 4 5 7 6 8 9 10 11 12 13 14 15 16 17 18 (I) (II) Atoomgetal (III) (IV) (V) (VI) (VII) (VIII) KEY/ SLEUTEL 1 Atomicnumber 2 2,1 H He 1 29 4 Elektronegatiwiteit Simbool 3 4 1,9 5 6 7 8 9 10 1,0 Li 1,5 Be Electronegativity Cu Symbol 2,0 B 2,5 C 3,0 N 3,5 O 4,0 F Ne 7 9 11 12 14 16 19 20 11 12 13 14 15 16 17 18 0,9 Na 1,2 Mg Benaderde relatiewe atoommassa 1,5 Aℓ 1,8 Si 2,1 P 2,5 S 3,0 Cℓ Ar 23 24 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 0,8 K 1,0 Ca 1,3 Sc 1,5 Ti 1,6 V 1,6 Cr 1,5 Mn 1,8 Fe 1,8 Co 1,8 Ni 1,9 Cu 1,6 Zn 1,6 Ga 1,8 Ge 2,0 As 2,4 Se 2,8 Br 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 0,8 Rb 1,0 Sr 1,2 Y 1,4 Zr Nb 1,8 Mo 1,9 Tc 2,2 Ru 2,2 Rh 2,2 Pd 1,9 Ag 1,7 Cd 1,7 In 1,8 Sn 1,9 Sb 2,1 Te 2,5 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 0,7 Cs 0,9 Ba La 1,6 Hf Ta W Re Os Ir Pt Au Hg 1,8 Tℓ 1,8 Pb 1,9 Bi 2,0 Po 2,5 At Rn 133 137 139 179 181 184 186 190 192 195 197 201 204 207 209 87 88 89 0,7 Fr 0,9 Ra Ac 226 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Downloaded from hlayiso.com 140 141 144 150 152 157 159 163 165 167 169 173 175 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 232 238 Copyright reserved Please turn over

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Downloaded from hlayiso.com 16 TECHNICAL SCIENCES P2 (EC/NOVEMBER 2019) USE GRAPH PAPER TO ANSWER QUESTION 7.6 NAME AND SURNAME: _____________________________________ Copyright reserved Please turn over

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