Physical Sciences Grade 10 P2 National Exemplar 2015 QP

Downloaded from hlayiso.com basiceducation Department: BasicEducation REPUBLICOF SOUTHAFRICA GRADE1O E.....-=-.----------rt!r!rttrrr- a-lrr--, 4G-=trrri $ ta tl (Pzl SCIENCES:CHEMISTRY PHYSICAL 1 tl tl tl It tl |l lr 2015 NOVEMBER tl al ttg ! r: g g ! r r---tllrtlllrr----rrrllrr---ltrr - r - - t - -) MARKS: 150 T I M E : 2 h o u rs This question paper consists of 15 pages and 2 data sheets. i iiltlil illi lillilti||ili il||1 lilll Copyrightreserved ilililil illil ll llllllllllllllllll llllilllllll ililililil E,qSTEFI'] |fl,PE Pleaseturnover

Downloaded from hlayiso.com PhysicalSciences/P2 z DBE/November 20'15 CAPS - Grade 10 INSTRUCTIONS AN D INFORMATION 1. write your name and crass (for example10A) in the appropnatespaceson t he A N S WE RB OOK . 2. This qu,estion paperconsistsof TEN questions.AnswerALL the questionsin t he A N S WE RB OOK . 3. start EACHquestionon a NEW page in the ANSWERBooK. 4. Numberthe answerscorrectlyaccordingto the numberingsystemused in this questionpaper. Leave oNE line between two subquestions,for example between QUESTION 2 . 1 a n d e U E S T I O N2 . 2 . You may use a non-programmable calculator. You may use appropriatemathematical instruments. You are advisedto use the attachedDATASHEETS. show ALL formulaeand substitutions in ALL calculations. Roundoff your finalnumericalanswersto a minimumof TWO decimalplaces. Give briefmotivations, discussionset ceterawhererequired. Writeneatlyand legibly. Copyrightreserved Pleaseturn over

Downloaded from hlayiso.com PhysicalSciences/P2 3 D B E / N o v e m b2 e r0 1 5 CAPS- Grade10 Q U ES T I O N1 : MU L T IP L E -C H O|CQUESTIONS E Four options are provided as possible answers to the followingquestions.Each question has only ONE correct answer. Choose the answer and write only the le t t e r ( A- D ) n e xt to th e q u e sti o nn um ber ( 1.1- 1.10)in the ANSW ER BOOK, for e x a m p l e1 . 1 1E . 1.1 I n w h ichON E o f th e fo l l o w i n globalsystem sar e all livingor ganism s found? A Biosphere B Lithosphere C Atmosphere D Hydrosphere e) 1.2 D u r i nga n e xp e ri me n a t, g ro u pof lear ner sobser veice m eltingin a beaker . WhichONE of the followingbest explainsthe learners'observation? A Th e i ce i s re l e a si n gh e a tener gy. B T h e i ce i s u n d e rg o i n ag physicalchange. C Th e i ce i s u n d e rg o i n ag c hem icalchange. D The ice is decomposingintothe elementshydrogenand oxygen. (2) 1.3 W h i c hON E o f th e fo l l o w i n igs a m ixtur e? A Ai r B A d i a mo n d C Distilledwater D So d i u mch l o ri d e e) 1.4 T h e n u m b e ro f n e u t r o n isn a n a t o mo f i l t t a i s . . . A1 B 11 c12 D23Q) ghteserved copvr p'ease turnover lllllillllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

Downloaded from hlayiso.com PhvsicalSciences/P2 A D B E / N o v e m b2 e r0 1 5 '10 CAPS- Grade 1.5 Wh e na to mX o f a n e l e m entin Gr oup1 ionisesto becom eX' , the ' . ' A ma ssn u mb e ro f X incr eases. B atomicnumberof X decreases. C chargeof the nucleusincreases. D numberof occupiedenergylevelsdecreases. (2) 1.6 Each of the substancesbelow is formed by attractiveforces betweentwo i o n s. l n w h i ch ON E o f th e substancesdo the constituentions have the s am e electronconfiguration? A KBr B NazS C MgC{z D CaClz (2) 1.7 In which ONE of the followingis the structurecorrectlylinkedto the given element? ELEMENT STRUCTURE A L i th i u m Covalent B lodine M olecular C Sulphur lonic D Carbon M etallic (2) 1.8 Wh i ch ON E o f th e followingbalancedequationsr epr esentsa diss oc i ati on process? A K.(aq)+ C{-(aq)--- KCt(s) B N a C t(s)- N a *(aq)+ Cf( aq) C Zn(s) + 2HCt(aq)---+ ZnCtz(aq)+ Hz(9) D + AgCt( s) - NaNO:( aQ) N a C l (a q )+ A g N Os( aQ) (2) Copyrightreserved Pleaseturnover

Downloaded from hlayiso.com PhvsicalSciences/P2 6 D B E / N o v e m b 2e r0 1 5 CAPS- Grade10 1.9 1 m oleof a substance? W hi chON E o f th e fo l l o w i ngr epr esents A 1 6 g o xyg e ng a s B 2ghydrogengas C 22,4 dm3copper D 22,4 cm3nitrogengas (2j 1.10 fo rmu l ao f a cer taincar boncom poundis CHzO' T he e mp i ri ca l for m ulaof thiscom pound? W hi chON E o f th e fo l l o w i ngcan be the m olecular A CzHoO B CgHoO C CzHqOz D CzHoOz (2) t20l shteserved copvr over P'ease turn

C- Downloaded from hlayiso.com PhysicalSciences/P2 6 D B E / N o v e m b2 e0r 15 CAPS- Grade10 QUESTION2 (Starton a new Page.) in the tableklelow. G r a d e1 0 l e a rn e rsw e reg i ve nthe substances brass sa n d oxygengas sugar car bondioxide copper purearr saltsolutr on I tablesait m a q n e s l u mc x l o e 2.1 Fromthe abovetable,writedown: 2.1.1 An element (1) 2.1.2 A h o m o g e n e o ums i x t u r e (1). A d i a t o m ig cas (1) 2.1.3 'C (1) 2.1.4 w h i c hi s a s o l i da t 2 5 A compound 2 .1 .5 nr ixtur e A h e te ro g eneous (1) 2.2 The learnersperforman experimentto separatea mixtureof sand and sugar. T h e e xp e ri me ni ts d o n ein thr eesteps,as shownin the diagr am sbelow. S o l i dX "::;;MffiO + lH'oig) \-J lVixtureY \-il--Mixture Y Step 1 Step2 Step 3 2.2.1 Writedown the nameof: (a) in step 2 The processillustrated (1) (b) in step 3 The processillustrated (1) (c) S o l i dX (1) (d ) Mi xtur eY (1) 2.2.2 l s ste p 3 a CHEM ICALor PHYSICALpr ocess?Give a r eas onfor the answer. ( 2) [ 11 ] Pleaseturn over Copyrightreserved llllllllllllll ll llllllll llllllllllllllll lllll ililllll

Downloaded from hlayiso.com PhvsicalSciencesiP2 7 2015 DBE/November '10 CAPS- Grade Q U E S T I ON3 (S ta rto n a n e w P age.) 3.1 A to D. T h e ta b i eb e l o wsh o w sthe boilingand m eltingpointsof substances BOILINGPOINT M ELTINGPOINT SUBSTANCE ('c) ('c) A 7B - 117 B 444 133 c _1BB -220 D 184 90 3.1.1 Definethe term boitingpoint. (2) 3.1.2 From the above table, wnite down the LETTER (A-D) that whichis a: th e substance re p re se n ts (a) L i q u i da t 1 0 0" C (1) 'C (1) ib) S o l i da t 1 0 0 (c) Ga s a t 25 "C (1) 3.1 3 Wh i ch ON E of the followingdiagr am sr epr esentsthe PART IC LE A R R A N GE MENT of substanceA at - 120' C? W r itedownonlyI, II or lii. T .t (1) Pleaseturn over Copyrightreserved ll llllllll llllllllll ililillllll ilililil lllllllll llllll

Downloaded from hlayiso.com B 2 r0 1 5 DBElNovembe PhvsicalSciences/P2 '10 CAPS- Grade 3.2 The heatingcurveof a substanceis shownbelow' o o (g o o. (u Tim e( m inutes) = (1) 3.2.1 Writedownthe physicalstateof the substanceat t 1 5 m i n u t e s . (1) 3.2.2 Wh a t i s th e boilingpointof the substance? 3,2.3 How will the average kinetic energy of the particles of the substancebe affectedbetween: (Wri ted o w n only INCREASES,DECREASESor R E M A I N ST H E SAME.) t = 0 m inutesand t = 5 m tnutes (1) (a) (b) t = 5 m inutesand t = 10 m inutes (1) 3.2.4 Referto the kineticmoleculartheoryto fully explalnthe answerto 3.2.3(b). (3) QUESTION t13 Pleaseturnover Copvriqhtreserved

Downloaded from hlayiso.com PhvsicalScienceslP2 q D B E / N o v e m b2 e r0 ' 1 5 CAPS- Grade10 QUESTION4 (Start on a new Page.) C h l o r i n ei s a n o n -me ta l l iec l e mentwith an atom tcnum berof 17 and can exis t isotopes. 4.1 De fi n eth e te rm: 4.1.1 A t o m i cn u m b e r {2) 4.1.2 lsotoPe tt) 4.2 i l o ri n eco n si stsof C&35and Cl- 37. N a tu rach 4 .2 .1 for Ct- 37. Wri ted o w nth e sp- notation (2) 4 .2 .2 T l re re l a ti ve atom ic m ass of chlor ine is 35,5. Calculatethe p e rce n ta g oe f Ct- 35in natur alchlor ine' {3) 4.3 t sf m o l e c u l e s ' e a s ( C t 2 ) c o n s i so Chloring Writedownthe: 4.3 .1 N u mb e ro f va lenceelectr onsin a chlor ineatom (1) (1J 4 .3 .2 T yp eo f b o n d ingin chlor inem olecules 4 .3 .3 for the chlor inem olecule L e w i sstru ctur e (?) 4.4 C a l ci u mre a ctsw i thch i or ineio for m calciur nchior ide" 4 .4 .1 D ra wth e A u fbaudiagr amfor a calciumion. (3) 4.4.2 Write clown the chemicalsymbols of the particlesfound in ca l ci u rnch l o r idecr ystal( lattice) . tlJ ll sl Pleaseturnover Copyrightreserved llllllllllllll ll llllllll llllllllllllllll illilililill E,{r:iiEFilt i:r.FE

L Downloaded from hlayiso.com 10 D B E / N o v e m b2 e0r 15 PhysicalSciences/P2 CAPS- Grade10 QUESTION5 (Start on a new Page') 5.lThefirstionisationenergyandthee|ectronaffinityofthepericd3e|ements are shownin the tablebelow' FIR,ST ELECTRONAFFiNITY ELEMENT IONISATIONENERGY (kJ'mol-') (kJ'moIL- 4 6? Sodium 496 -- 738 0 Ma g n e si u m AA ++ Aluminium 578 42r', S i l i co n 786 IJT 7) P h o sp h o ro u s 1012 I L o nn avv Sulphur I 000I r49 C h l o ri n e __1291 _-__ n U Argon 1 521 5.1.1 E x p | a i n t h e d i f f e r e n c e b e t w e e n i o n i s a t i o n e n e r g ' y , a l d e l e c t r a tn' Z ) affinity. energyas shown 5.1.2 Give a reasonfor the trend in the first ionisation (1) i n th e ta b l e. tc that cor npar a' ener gyof soclium 5.1.3 H o w w i l lthe sECONDionisation LOW ERT H Ai { or o i r" g n " ri um f W iite downonlyHIGHERTHAN' i?\ E QU A LT O. ExPlainthe answer ' 46 g of i'la(g)' (3) 5.1.4 calculatethe energythat will be needeclto ionise greatesttencencvto 5.1.5 which oNE of the above erementshas the to give a reitson frornnegativeions? Referto the data in the table /?\ for the answer. Pleaseturnover Copyrightreserved

Downloaded from hlayiso.com 11 D B E / N o v e m b 2e r0 1 5 PhvsicalSciencesiP2 CAPS - Grade 10 5.2 Studythe substances(A-E) in the table belowand answerthe questionsthat follow. SUBSTANCE A S ulphurpowder B Sodiumchloridecrystals c Copperwire D COz(s)[dry ice] E A diamond 5 2.1 Writedownthe LETTER(S)that represent(s): (a) A substancewith a giantatomiclattice (1) (b) A substancewith a latticeconsistingof positiveions and valenceelectrons delocalised (1) (c) TWO substances with intermolecularforces between particles (2) Use Lewisstructuresto showthe formationof substanceB. (4) 5.2.2 5.2.3 Repr esenthis change su b sta n ceD u nder goesSUBLIM ATION. w i tha ch e mi ca lequation. (2) 121l QUESTION 6 (Start or! 3 h€\tv'paEe.) p r o d u c ea w h i t e s o l i d , M a g n e s i u mr i b b o n b u r n s i n o x y g e n w i t h a b r i g h tw h i t e f l a m e t o c l xi d e , magnesium 6.1 N a m eth e typ eo f ch e mi calbondingin: M a g n e s i u rmi b b o n (1) 6.1.1 l V l a g n e s r uom xide (1) 6.1.2 6.2 i s th e re a cti o nb e tw e e nmagnesiumr ibbon and oxygen a PHYSICALor ( 2) C HE MIC A Lch a n g e ?Gi vea r easonfor the answer ' 6.3 W r i te d o w n a b a l a n ce de quationfor the r eactionbetweenmagnesiumand ( 3) o x yg e n . 6.4 Use the law of conservation of mass to show that mass is conservedduring (4) t h e re a cti o inn QU E S T ION6.3" t 11 l Pleaseturnover Copyrightreserved llllllllllllll ll llllllll lllllllllllll illlllllll ilililil F n , . T E F t .rt! . F E

Downloaded from hlayiso.com 12 2015 DBE/November PhvsicalSciences/P2 CAPS- Grade10 QUESTION7 (Start on a new Page.) acid, HCl, accordingto the Calciumcarbonate,CaCO3,reactswith dilutehydrochloric followingbalancedequation: CaCt2(aq)+ COz(g)+ HzO(t) CaCOs(s)+ 2HCl(aq)'--+ 7.1 The above reactionis an exampleof an acid-basereaction.Definethe term acid-basereaction' (2) betweenthe volum eof car bondioxidegas , T h e g r a p hb e l o wsh o w sth e re l a tionship C O z ( g )f o r me da n d th e ma sso f P UREcalciumcar bonate' E l) N o () o E 5 6 Massof CaCO3(g) 7.2 F r o m th e g ra p h ,d e te rminethe volum eof CO2( g)pr oducedwhen 0' 0729 of (1) PU R EC a C Og (s)re a cts. 7.3 A ce rta i na n ta ci dta b l e t,with a m ass of 0,25g, containsm ainly cal c tum carhronatewhich reacts with dilute hydrochloricacid in the stomach to producecarbondioxidegas. 3' ic in the stom achis 0,1 m ol' dm T h e co n ce n tra ti oonf h ydr ochlor acid 7.3.1 of a solution' Definethe term concentration (2) 7.3.2 lt is found thaI25 cm3of COz(g)is formedwhen one antacidtablet comPletelY reacts' Use the informationin the graph and calculatethe percentage C a C Oe (s)i n o ne antacidtablet' (3) 7.3.3 by acidthat will be neutralised Calculatethe volumeof hydrochloric ON E a n ta ci dtablet. ( 5) t13l Pleaseturnover Copyrightreserved ll ll llllllllllllll lllll ililill llllllllllll ll llllllll

Downloaded from hlayiso.com PhysicalSciences/P2 13 DBE/November 2015 CAPS- Grade10 QUESTION8 (Start on a new page.) 8.1 Many chemicalreactionstake place in aqueoussolutions.Definethe term aqueoussolution. (1) 8.2 lonicsolidsdissociatewhen dissolvedin water. 8.2.1 Definethe term dissociation. (2) 8.2.2 Write down a balancedequationfor the dissociation of ammonium (N ca rb o n a te , Ha) 2COs, in water . (3) 8.3 The experimentalsetup below is used to comparethe electricalconductivity o f a ca l ci u mch l o ri d eso lution,CaCl2( aq) ,and a sodiumchlor idesoluti on, NaCf(aq).The concentration of each solutionis 0,5 mol'dm-3. The CaC{z(aq)is added drop by drop to water and the ammeterreadingis recordedafterthe additionof each drop.The procedureis then repeatedwith the NaCl(aq).The resultsare shownin the tablebelow. NUMBER OF AMMETERREADING(mA) DROPSOF CaG€2(aq) NaC€(aq) SOLUTION 0 0.18 0.18 1 0.55 0,34 2 0.92 0,55 3 1.29 0,74 4 1.47 0,92 5 1,84 1,1 o 2,21 1,29 7 2,39 1,47 8.3.1 l d e n ti fyth e : (a ) var iable D e p e n dent (1) (b) Independent variable (1) Copyrightreserved illillll |ilililililtililtilillililtlllil ililililrililrililr E A S T E F NE A F E Pleaseturn over

Downloaded from hlayiso.com 14 D B E / N o v e m b2 e0r 15 PhysicalSciences/P2 CAPS- Grade10 g.3.2 From the results, deduce the relationshipbetween the ion in a solutionand its conductivity' (1) concentration g . 3 .3 U se b a l a n ce dchem icalequationsto explainwhy CaCt2( aq)is a than NaCt(aq). ( 4) strongerelectrolyte 8.4 Indicatethe type of reactionrepresentedby each of the followingequations' REDOXor GAS FORM ING. W r ited o w no n i yP R E C IP ITATION, - - - Cu( s)+ ZnSO+ ( aQ) (1) 8 . 4 .1 Z n (s)+ C u S O+( aq) (1) 8 . 4.2 Z n (s)+ Z H C t(a q)- - +Znct2( aq)+ Hz( g) (1) 8 . 4 .3 N a zC Oa (a q+) B actz( aq)- - - 2NaCt( aq)+ BaCO:( s) g.5 Writedown a balancedchemicalequationfor the followingword equation: (3) Nitricacid + copper-+ copper(ll)nitrate+ water+ nitrogendioxide llel QUESTIONI (Start on a new Page.) 9.1 H y d ro g e n ,H z(g ), a n d n itr ogen,Nz( g) , r eact to for m am m onia,NHs ( g) . The reactionthat takesplaceis representedby the followingequation: N z ( g )+ 3 H z ( 9 -) ' 2 N H s ( g ) ( 2) 9 . 1 .1 D e fi n eth e te rm 1 m ole. g . 1.2 H o w ma n y mo les of am m oniawill be pr oducedfr om 1 m ole of ( 1) h yd ro g e ng a sZ g . 1.3 In i ti a l l y1 0 cm3of nitr ogenand24 cm 3of hydr ogenar e m ixedin a container.The temperatureand pressureremainconstant. C a l cu l a teth e volum eof gas that will r em ainin the containerafter (4) the reactionis comPleted' gas to form In anotherexperiment,80 g of hydrogengas reactswith nitrogen a m rn o n l a . Calculatethe: N u mb e ro f mo l esof hydr ogengas r eacted (2) 9 .1 .4 (2) 9 .1 .5 V o l u meo f th e nitr ogengas usedat STP of g.2 When 207 g of lead, Pb, combineswith oxygen,239 g of.a certainoxide - j - - Use a calculationto determinethe formula of this oxide of lead is formed. (5) lead. t16I Pleaseturnover Copyrightreserved Iiltillltt llllllltllll llillllillllllllllllllllt illlll

__-___j Downloaded from hlayiso.com PhysicalSciences/P2 t3 D B E / N o v e m b2 e r0 1 5 CAPS- Grade10 Q U E S T I O N1 0 (S ta rto n a n e w P age.) -l'he water cycie in the diagram below links the hydrosphereto the other global systerns.The lettersP, Q, R and S indicatesome of the processeswhichtake placein t h e w a t e rc vci e . 10.1 Brieflyexplainthe term hydrosphere. (1) 1 A. 2 N ameth e p ro ce sse lsa b e lled: 1A.2.1 P (1) 1A.2.2 0 (1) 1 0 .2 ..3 R (1) 1 0 .2 .4 S (1) 10.3 Writedown ONE advantageof processR. (1) 1C.4 T h e b u i l d i n g o f d a ms has sever al advantaEesfor hum ans and the environrnent. StateTWO of theseadvantaEes. (2) t8I TOTAL: 150 Copyrightreserved llllllllllllll ll llllllll lllll illlllllllllll llill |ililtil EA,STEFiI'] L_+\FE

Downloaded from hlayiso.com PhvsicalSciences/P2 DBE/November 2015 CAPS- Grade10 DATAFORPHYSICAL GRADE1O SCIENCES PAPER2 (CHEMISTRY) GRAAD10 GEGEWENSY'R F'S'ESEWETENSKAPPE VRAESTEL2 (CHEM|E) KONSTANIES BEL 1: FTSIESE TABLE1: PHYSICALCONSTANTS/IA NAME//VAAM SYMBOL/SIMBOOL VALUEIWAARDE S t a n d a r dp r e s s u r e p" 1, 0 1 3x 1 0 ' P a Standaarddruk M o l a rg a s v o l u m ea t S T P v,,n 22,4 dm3'molj Mol)re oasvolumebv STD Standardtemoerature TE 273K Standaardtemperatuur Chargeon electron - 1, 6 x 1 0 - 1C e e Ladinq op elektron 2: FORMULES TABLE2: FORMULAEITABEL m N n --- n=- M NA n ffi V oR c= n-_ V MV v, Copyrightreserved llllllllllll llllllllllll ililllill ilillililililililillil

Downloaded from hlayiso.com -= -a Fl *f*l=fn Pie 3g$ fi>?E r I (c)L @E -'i r o (Y) F- c ) r L r.- ar n' N L q) N= -) o r l . t - P :o3 3fi3 3-F 3t RfE H: E 0'v 0'g g'z g'z g'z o) z S' @O: s(/,stcq (r)O oF*r sFgF tfO @L o) Eot (0 -L (g) FE LU c0 o H g'0 g'z ?'z ,'z o'z |-- = ul *zS;PaEBtp E8$ i , 5 O R m'-O) f st 3fiF or -El l oLl i I Lu 0't t'z 0'z 6'! 6'I = s :3 ... coQS:ihK SERE63o,r ll @ o - x\ (o 9e oo,r OlI| -I g'z 8'L 8,L 8'L 8'1, t{t 58R s5: EFH Eegr6 = F UI co3 F= l.r::eN | 0'z s'r, g't L'l B'l Y g".l o Eo oElS o CD= cf,N(o so: @IX 3f$ p-5 a=' o, dl o g'|, L'I, t ut o.: l! RE$l.- CDP RiE ${= SEF-o toC e 6'f 6't a <)cjo -o !40 rotlP R=E {o-= REE Ic"r ,i$ 35 :*l *tl| pa s8 EE frfr trH g'l z'z i' - oS t\o) E_ aa I Es F- Ool roEP c.,l (J ,O $ E : i: E o LU) .{J O,L aA 0_F *V z IIJ Efl €€ I't z'z l @ (l) - !I :5-R3fr'*$ to Oro $iF F8E l' 5 ls=o Eo c\ lL ro l- -ii uJ E< I 6',r I EE z'z -! J 8'l _; uJ l,- l! ro cro cy) (J pflE -U l' E] $fft ( E - ( l ) c.l .o $F io J gs Oi* It = FE g'L IJ 6'L o c.r 0.o i- il=E gF N6$ I .f=o, io) L.F ftt FG) o o s -rlr g b $$ g'l, g'l lro o-: o o o d 6ts R>E -t z! l oo r) RfF sE3 rF$ u- #t &.lr LlJ g'l o- LIJ F-t (\!-@ NF\f sft5 il=g # 9't t', g'l tJ.l dls) F c\ (t) { Oro g>g h-5fl o@) O< N F E,I z', o_ a c (\= of;. N cDa' o - = c.,l c.{ (J (Eer $ s63 3ff8 3dfr ! L ' n6l 9't z'L 0'l 6'0 U) 0'! 6'0 L o .() a F!F - (Y) | l"* -ZN G c"l or rz or r l l o F ril (f) 6v.@ 388 iD II NL _c 'c o- (L lr'Z 0'L 6'0 g'o g'0 L'0 L,O