MP-Physical-Science-Grade-10-June-2023-P2-and-Memo_hlayiso.com_.pdf

Downloaded from hlayiso.com F education MPUMALANGA PROVINCE REPUBLIC OF SOUTH AFRICA MARKS: 100 TIME: 2 HOURS This question paper consists of 12 pages and TWO data sheets.

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 INSTRUCTIONS AND INFORMATION 1. Write your name and class (for example 10 A) in the appropriate spaces on the ANSWER BOOK. 2. This question paper consists of 8 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 between 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 calculations. 10. Round off your final numerical answers to a minimum of TWO decimal places. 11. Give brief motivations, discussions et cetera where required. 12. Write neatly and legibly. Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 1: MULTIPLE CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A-D) next to the question numbers (1.1-1.5) in th@ANSWER BOOK, for example 1.6 E. 1.1. Only tworelectrons that spin in the opposite direction can exist in an orbital. A Pauli’s exclusion principle. B Hund’s rule. Cc Heiselberg’s principle. D None of the above. (2) 1.2. Ina physical change, which one of the following statements is true? A The number of molecules remains constant during the reaction. B The mass is not conserved but the number of molecules is conserved. Cc The mass is conserved but not the number of atoms. D The atoms are rearranged but remains conserved. (2) 1.3. Which one of the following is the correct formula for lithium carbonate? A Li,CO3 B LigC Oz Cc Liz(CO3)3 D ~—LiCO, (2) Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 1.4 The formula mass of C204H2.2H20 is: A 110 B 126 c sie D 108 (2) 1.5 Four gases and their corresponding temperatures are given below. Which ONE of the four will have the greatest KINETIC ENERGY? Gas Temperature (°C) A Yo 53 B X2 12 Cc Qe 68 D Re 6 (2) [10] Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 2 ELEMENTS OF A SMART WATCH Screen Electronics At Si QacK Cu Ag Au Si Sn Pb Le! \ J Y The glass used on Copper is used for wiring in the watch whilst copper, gold and silver are the major metals from which micro electrical components are fashioned. Pure silicon is used to manufacture the chip in the watch. Tin and lead are used to solder electronics in the watch. Newer lead- free solders use a mix of tin, copper and silver. most smart watches is an aluminosilicate glass composed of a mixture of alumina (At2O3) and silica (SiOz). The glass also contains potassium ions, which help strengthen it. Most watches use lithium-ion batteries which are composed of lithium cobalt oxide as a positive electrode and graphite as the negative electrode. The battery’s casing is made of aluminum. Plastics will also include flame retardant compounds, some of which contain bromine, whilst nickel can be included to reduce electromagnetic interference. Battery Casing Li Co O C At Br Ni C 2.1 Define the term compound. 2.2 Draw the Lewis diagram of an oxygen molecule. 2.3. Name the group of the periodic table to which the elements.potassium and lithium belong to. 2.4 Name one ferromagnetic substance referred to in the extract: 2.5 Name a substance from the extract that would be classified as an electrical conductor. Copyright reserved Please turn over (2) (2) (1) (1) (1)

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 2.6 Give the symbol of the element from the extract with the greatest electron negativity. 2.7 In one of.the substances named in the extract, the conductivity increases with an increaselin temperature. Give the NAME of this substance. 2.8 Completesthe following table for the bromine ion by ONLY writing down the question-number (2.8.1 — 2.8.3) and the CORRECT answer. Symbol of | Atomic Mass Protons Neutrons | Electrons ion number number 2.8.1 35 80 35 2.8.2 2.8.3 Copyright reserved Please turn over (1) (3) [12]

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 3 The diagram below shows the cooling curve of carbon dioxide gas. 40 iS 20° nal Temperaute (°C) & o -100 -120 Time (Hrs) 3.1 3.2 3.3 3.4 3.5 In which phase is carbon dioxide at -40°C? At which temperature will carbon dioxide freeze? At which point on the graph does the substance have a definite shape and the molecules are close to one another in an orderly pattern? At which point on the graph does the substance undergo condensation? Refer to line BC to answer the following questions. 3.5.1. Name the phase change that takes place at BC. 3.5.2 Name the change of state that takes place at BC. 3.5.3. Explain the change in phase that takes place at BGpby referring to the intermolecular forces and energy of the substance; Copyright reserved Please turn over (3) [09]

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 4 Element X has three isotopes in nature , the table below shows the percentage abundance of each isotope. Isotope Percentage abundance 24x 78.99 25y 10.00 oy 11.01 4.1 Define the term isotope. (2) 4.2 Calculate the relative atomic mass of element X and name the element. (4) 4.3. Calcium reacts with iodine. 4.3.1. Write down the symbol of the calcium ion. (1) 4.3.2 Write the sp-notation of the calcium ion. (2) 4.3.3. Draw the Aufbau diagram for the calcium ion. (3) 4.3.4 Name the type of bond formed when calcium reacts with iodine. (1) 4.3.5 Indicate the formation of the bond by making use of Lewis diagrams to show the chemical equation. (4) [17] Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 5 The first ionization energy and atomic number of each of the first 18 elements of the periodic table issgiven below. 1312 }«—~4First ionization energy in kJ-mol 1 {— Atomic number 1312 2372 H He 1 2 520 900 801 1086 1402 1314 1681 2081 Li Be B Cc N ce) F Ne 3 4 5 6 7 8 9 10 496 738 578 786 1012 1000 1251 1520 Na Mg Age Si P Ss ce Ar 11 12 13 14 15 16 17 18 5.1. Define the term first ionization energy. 5.2 | Why does helium, neon and argon have such high ionization energies? 5.3. Explain why fluorine has higher ionization energy than oxygen. 5.4 | Which atom between beryllium and magnesium has the biggest atomic radius? 5.5 Explain the answer to QUESTION 5.4. 5.6 How does electronegativity change down a group? Only write down INCREASE, DECREASE or REMAIN THE SAME. Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 6 6.1. HC occurs as a colorless, nonflammable aqueous solution or gas. It is used in several industries around the world. 6.1.1 [Give the chemical name of HC2. (1) 6.1.2 —Name and define the type of chemical bonding that exist between the (3) molecules of HC£. 6.1.3. Which atom in the HC? molecule has the highest electron affinity? (1) 6.2 Study the diagram below. 6.2.1. Which type of chemical bonding is represented by the diagram above. (1) 6.2.2 Name the particles between which the above mentioned chemical bond is formed. (2) [08] Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 7 7.1. When sulphur dioxide gas dissolves in rainwater, acid rain is formed. This is a form of dit=pollution that causes widespread damage to the environment. H,0(£) + S02(g) > H2S03(aq) 7.1.1. Is this a physical or a chemical change? (1) 7.1.2 Explain the answer in QUESTION 7.1.1. (2) 7.1.3 State the Law of conservation of mass in words. (2) 7.1.4 Is the mass conserved in the reaction? Make use of relative atomic masses to explain your answer by doing a calculation. (4) 7.2 Classify the following chemical reactions as synthesis, decomposition or ion- exchange reactions. 7.2.1 Zn(s) + 2HCE (aq) > ZnCez (aq) + H2(g) (2) 7.2.2 CuC03(s) > CuO (s) + CO2(g) (2) 7.3. Balance the following equations: 7.3.1 BaCO3(s) + HC’(aq) > Balt2(aq) + H2CO3 (aq) (3) 7.3.2 Cu(s)+ HNO3(aq) ~ Cu(NO3)2(aq) + NO2(g)+ H20(2) (3) [19] Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 NSC MDE/June 2023 QUESTION 8 There are several steps in the production of fertilizers. In the third step, nitrogen dioxide is absorbed by Water to produce nitric acid. Nitric acid and ammonia can react together in an acid-bas€-process to form the salt, ammonium nitrate, which is soluble in water. 3N02(g) + H,0(#) > 2HNO3(aq) + NO(g) NH; (£2) + HNO3(2) > NH,NO; (s) 8.1 Give the scientific name of nitric acid. (1) 8.2 Calculate the relative molecular mass of ammonium nitrate. (2) 8.3 Calculate the number of moles of ammonium nitrate if 15 g of it was formed. (3) 8.4 Calculate the volume of 12 g of nitrogen oxide at STP. (5) 8.5 Calculate the number of nitrogen atoms present in 2 moles of ammonium (4) nitrate. [15] GRAND TOTAL 100 Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 DATA FOR PHYSICAL SCIENCES GRADE 10 NSC CHEMISTRY MDE/June 2023 GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10 CHEMIE TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Avogadro's constant 23 1 Avogadro-konstante Na 6,02 %40" mol Molar gas constant ee peers Molére gaskonstante Re siiaiieniaadibiaare Standard pressure 6 & Standaarddruk P LOIS RC a Molar gas volume at STP Boas Molére gasvolume by STD Ven SS Standard temperature é Standaardtemperatuur T 273k TABLE 2: FORMULAE/TABEL 2: FORMULES pV = P2V> pV =nRT Tt aot pa M Na ss c=" = ORIOF— o= ae Vv MV Copyright reserved Please turn over

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com Physical Sciences/P2 MDE/June 2023 NSC at2 zez J7 | ON | PW| Wy) se) 3D 4s | wo} wy) ng) dN nm ee] UL col | zor | tor | ook | 66 | 88 ze | 96 | cs | ve | t8 ze te | 06 Gut | e2b | 6ob | 294 | Sob | Sob Gch | Zot | Z5h | OSE FRL Le M1] GA | WL| 43 | OH | Ad Gh | PH | nS | ws | Wd PN Jd = LZ L 69 89 19 99 PE bi] $9 fa] ie] os 6s ey £ oF | s se 60c ]20e |r0e boc 26. |S8) |zét Jost 58. Fat Jel teh uy |i sods ta siqdasiateGH inv jig | 1 |SO 88 OM Pa esos sg |ss |+a [ss [ze [is o8 |e [se | [st Se bh 9s gs ier [ize [ect [zee lent [ott ctr [sor [oor |eor | Lor 36 a) ax | 1 Sapeag suse) us posiSysipe s/uepinys 5 ows I$ 548s ro [es [to [is [os [ep or | ap | sp |op [er ch oer set #3 [os | 6 L le |or ss |sea les [es |Ss Ss eg o 6 IM [4G F/9S 2 SV 5/29 e/ eO se UZ SING IN GODS Pde UW DS MOSHE 9c Se Fe ec oe yy o¢ 62 & 4 Er Sa 74 0g 61 or [sce [ze [at [az | ur PSSELIMOO EF aM aREfel apIOpeley | OEE Wy ja ¢|S Bid Sis slave —— BW SNS gL pal SL cL pL €L tL Lh oc [et for le. fa lw clea maunnehouenseg G L N |e esOTNZIRAS pe nd 3 \— Aunebouonsa3 eee ns OL 6 g Z 9 g ; 62 id ¢ ' ; L aH ieiwooy HS ; Sil denise FALNFIS!ASM i Gua) A) Ns : (i) 1) 8L yaa SL SL PL €L a bb oF & g 3 4 5 L SINAW3TS 30 STEN L DIG0idSd AHL -e FEV L

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com education MPUMALANGA PROVINCE REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 10 PHYSICAL SCIENCES: CHEMISTRY P2 FISIESE. WETENSKAPPE: CHEMIE V2 JUNE/JUNIE 2023 MARKING GUIDELINE/NASIENRIGLYNE MARKS: 100 This marking guideline consists of 9 pages: Hierdie nasienriglyne bestaan uit 9 bladsye.

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com QUESTION/VRAAG 1 1.1 Dvv 12 Avv 13 Avv 14 Bvyv 15 Cvv QUESTION/VRAAG 2 2.1 Chemical substance that forms when two or more atoms of different elements combine in a fixed ratio. VW Chemiese stof wat vorm wanneer twee of meer atome van verskillende elemente in 'n vaste verhouding bind. VW v Marking criteria/Nasienkriteria: v e One mark for double bond. O::0o0 e One mark for whole structure correct. e Een punt vir dubbelbinding. e Een punt vir die hele struktuur korrek 2.3. Alkali metals/Alkali metale v 24 Cobalt / Nickle v Kobalt/Nikkel v 2.5 Copper/koper ~ 26 Ov 2.7 Silicon/silikon “ 2.8.1 Briv (2) (2) (1) (1) (1) (1) (1)

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com 28.2 45v (1) 28.3 36Vv (1) [12] QUESTION/VRAAG 3 3.1 Gasv (1) 3.2 -80°CV (1) 3.3. Point/punt EF v (1) 3.4 Point/punt BC v (1) 3.5.1 Condensation/kondensasie ¥ (1) 3.5.2 Gas to liquid. Y (1) Gas na ‘n vioeistof. ” 3.5.3 At BC the temperature stays constant. v The energy released causes an increase in intermolecular forces V so that the gas changes into a liquid. W (3) By BC bly die temperatuur konstant. “ Die energie wat vrygestel word veroorsaak 'n toename in intermolekulére kragte Y sodat die gas in 'n vioeistof verander. ¥ [09]

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com QUESTION/VRAAG 4 4.1 4.2 4.3.1 4.3.2 4.3.3 Atoms of elements with the same atomic number/number of protons, but different*fmass numbers/numbers of neutrons. VW AtomeWan elemente met dieselfde atoomgetal/getal protone, maar verskillende massagetalle/getal neuti rone. (24 x 78.99) + (25 x 10) + (26 X11.01)¥ Relative atomic mass = = 24.32uv The element is magnesium. “ Die element is magnesium. ¥ Ca2t v 100 7 Markin. 1s? 2s* 2p8 v 3s? 3p§ v g criteria/Nasienkriteria One mark for level one and two. One mark for level three Een punt vir viak een en twee. Een punt vir viak drie. 3p » Eb th th em thi thi th e One mark for level one. e One mark for level two. e One mark for level three e Een puntvitviak een. e Een puntvir viak twee. e¢ Een punt vir viak drie Marking criteria/Nasienkriteria: (2)

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com 4.3.4 4.3.5 lonic bond ¥ v eo. ¥ a een v Cas #2 2°13 —- [Ca] 2[21 ] ee eo OR Caf or cal” 2 [212] QUESTION/VRAAG 5 5.1 5.2 5.3 The energy needed to remove the electron that is held the weakest by an atom in the gaseous phase. vv Die energie wat nodig is om die elektron te verwyder wat die swakste deur ‘n atoom in die gasfase gehou word. Vv They have filled energy levels (a full octet configuration) Vv and are therefore very stable. W Hulle het gevulde energieviakke (‘n volle oktetkonfigurasie) Y en is dus baie stabiel. Vv As you move across a period the atoms become smaller and therefore the electrons are closer to the nucleus. v The size of the positive nucleus becomes bigger, and the electrons are attracted stronger which requires more energy to remove them. v Therefore, fluorine has higher ionization energy than oxygen. (1) [17] (2)

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com 5.4 5.5 5.6 Soos jy oor 'n periode beweeg, word die atome kleiner en daarom is die elektrone nader aan die kern. Y Die grootte van die positiewe kern word groler, en die eleklrone word slerker aangetrek wal meer energie benodig om hulleyteverwyder. Y Fluoor het dus hoér ionisasie-energie as suurstof. Magnesium / Mg ¥ As you move down a group new energy levels are added to the atoms ¥ and therefore the radius becomes bigger since there are more electrons.v Soos jy afbeweeg in 'n groep word nuwe energieviakke by die atome gevoeg Y en daarom word die radius groter aangesien daar meer elektrone is. “ Decrease/verminder ¥ QUESTION/VRAAG 6 6.1.1 6.2.1 6.2.2 Hydrogen chloride v Waterstofchloried v A covalent bond vis formed when electrons are shared between two non- metal atoms. vv 'n Kovalente binding “word gevorm wanneer elektrone tussen twee nie- metaalatome gedeel word. vv Chlorine /Chloor/ Cf ~ Metallic bonding/metaalbinding v Sea of delocalized electrons v Positive metal atoms. “ See van gedelokaliseerde elektrone Vv Positiewe metaalatom ¥ (1) (1) [10] [08]

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com QUESTION/VRAAG 7 7.1.1 Chemical change/Chemiese verandering “ 7.1.2 The atoms/have rearranged to form new products v with new properties. v Die atomerhet herrangskik om nuwe produkte te vorm Vv met nuwe eienskappe. ¥ 7.1.3. The total mass of substances in a closed system stays constant in any physical process. Vv Or In a chemical reaction the sum of the mass of the reactants equals the sum of the mass of the products. Die totale massa van stowwe in 'n geslote sisteem bly konstant in enige fisiese proses. VV Of In 'n chemiese reaksie is die som van die massa van die reaktante gelyk aan die som van die massa van die produkte. 7.1.4 H,0(£) + S02(g) > H2S03(aq) 2(1) + 16 + 32 + 2(16)v¥ > 2(1) + 32 +3(16) v 82g - 82gv Mass is conserved ¥ Massa bly behoue ¥ 7.2.1 lon-exchange reaction vv loon-uitruiling reaksie Vv“ 7.2.2 Decomposition reaction vv Ontbindings reaksie vv”

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com 7.3.1 BaCO3(s) + 2HC# (aq)Y¥ > Bal?2(aq) + H2COz3 (aq) v verre (3) 7.3.2 Cu(s)+ 4HNO;(aq)¥ > Cu(NO3)2(aq) + 2NO,(g) + 2H,0(£) v v™ (3) Marking critefia-for question 7.3.1 & 7.3.2 /Nasienkriteria vir vraag 7.3.1 & 7.3.2 Reactants/Reaktante Products/produkte Balancing/balanseer QUESTION/VRAAG 8 8.1 Hydrogen nitrate v Waterstof nitraat v 8.2 MNH,NO3) = 14+4(1)+ 14 + (3)(16) v = 80 g:mol' v 8.3 n= my M = By 80 = 0.19 mol ¥ 8.4 MANO) = 14416 = 30 g:‘molt v m n=— M =v 30 = 0.4mol Vv V=nVn Y = (0.4)(22.4) = 8.96 dm3 Vv 1 mark/punt 1 mark/punt 1 mark/punt [19] (1) (3) (6)

Downloaded from hlayiso.com Downloaded from Stanmorephysics.com 85 N=nN,v (2)(6.02 x 1023) v(2) v 2. 10** nitrogen atoms — stikstof atome V (4) [15] GRAND TOTAL/GROOT TOTAAL 100