chemistry answer sheet

7/28/2019 Chemistry Answer Sheet

1/14


2/14

Y/

(b)

t'"5t1 ) i /

State the boiling point of solid p.lyatakan takat didih pepejal P

136o c.[1 mark]lI markakl

(iii) Explain why the temperature remains constant frorn time t1 to t2.Terangknnkenans suhu tidakberubah dari masatl hingga t2.'FI$::l *t1y! r: * +D o:::::_u +'*b.lw"-"-, lo-^r,h c).,u so s-'r U d ep.n $urr, lnj-o liq w.

[2 marks]12 markah]

Diagram i.1 and Diagram 1 .2 show the apparatus set up of two expedments.Rctjah l. I dan Rajah 1.2 rnenunjukkan susunan radas bagi dua eksperinten.

Aftel I irour

*l:j:::!::_*

Iiotassiurn lnanganilte{\rI l) cryst;r lsI Iuhlur ku I iu n Hun.qGil0t( \/l I )

Purlr I e co I ou r of potassium rn anLlilnate{ V I I)' e rysi a I s .s preacl ilr ioit gh ri ur ttij r.v lrtcr

l'Yu rnu u n gu lt obl u r ka I i u rt rtt tr r t gu t r t t t(VIl)

tner"eb*k ka *-elunrh eirDiagram l. iRajah I.l

4541.12 ILihat h;rlaman sebelah]


3/14

Poi:lssiiitl'l lllangallale(vll) crt'stals Purpie ccilour of porassir.lnl rnangaratc(VII)fich!tti' kulium nlilng{rn{tt(\/il) crystals sprcail tlrroLrghout iirc gcl

L'{:u t"' rt tr tt,qu ltubltu' kn I iu m rttarryurtttll\/ fi}t t t,.: t' t: It t t k kt .t c I u m /.t u. 1,:. tt t._ tt ge t.

Diagram 1.2Raiah 1.2

State the name of the process involved in both experimentsNya{akan nsma proses yong terribat dorsm kedui-dua uirprri*un,

*iw:i:r [1 mark][1 markah]lPt. t_h" type of particle present in potassium manganate(vll) crystals.Nyatakan jenis zarah yang terdapai dolo* habltr tottu*manganat(Yll).

ians

marklmarkahl

(D

(ii)

u[1

(iii) Based on Diagram 1 ' t and Diagram 1.2, explain the differences in theobservation by using kinetic theory of matter.Berdasarkan rajah r.r dan r.z, terangkan perbezactn dararn , ir r. rpemerltatian dengan menggunakan tiori kinetik jirim /

l/u+w ! \,,$ - i,, ..!':,ti ..bq:|,&,.-ry< paluQ Cct,gt, ;' ,.^JL^.4 ,cL*Ns-,a t,n+

rl... ...t\_r1,j..,n..ff.d,4it4")..:r:*.*r:+J ::.,.:y. i...i; r. "..q)..J.:i.: iy ur.. ,o.,., _,

fvt. ot lt \p n cet, Lrln, .r-o-n, y-- ]^; j*, ii L. /, ebel cLE L-"-rr, o---o. t2:z.J {i "'i""' u I

,(t^f,-',.t"J, ;j-: / wrtu < L' ' L) .,' lr.Lr\ r \d * [3 nralksJ13 markahl

4541/2ILihat halaman sebelahJ


4/14

i ,r41 l2

Diagram 2 shows the set up of apparatus to determine the empirical formula of copJieroxide.Rajalt 2 menunjukkan susunan radas untuk menentukanformula empirik bagi kuprumoksida

Ilurrring of exc:css lti,drollr;:n gal;{) c n tl.t ukt rm I e Ltihan gu.r h i tl r o y m

(a)

:li:T::il;ii;:,i'q['J .,._=.,,s

,i]. ,{,( ,''c

,*irrc

hti iiCt"i'

'i tr, |{tt1tv11111irltr'lrt

tiir. li nl: ,\,,,ccr',i,r rri,i,$r.F#\ il )';,1:, Prr ccr'; irr rri':i;l:rrjiiil:lil'l'' ; -,,,-. ,i, ,, .. , '"'""' !)I!t\ittt

6il rJ'u-v* {b o-ch

ii nlt\,rir or.rs c;rlerittm cliLrridr;liultutn l;loriiu tt rhitlrit

Diagram 2Ra.iah2

What is meant by empirical formula?Apckah yong dimaksudkan dengan for mul a e mp ir tk?

Fav n^.-.!.r. '{'t*4-- ?h*ns vr'vvt pLoc* ush,,l-? Itw*"-L.*, o *4-'o...J....

I mark]l1 morkah)

(b)Nyatakan fungsi kalsium klorida terhidr s I

!t

+b ^,bt "^rt vD^4"- va$ cMaImarklnmrkrsh]

liU

4s41/7 ILihat halaman r;ebe !al.l


5/14

454L/2

wL"?.

toi

tiiE5

1Table 2 shows tire iLoa, o t i',i

": );;; ;tr:,E; I:;: :;:#: ;;,,,,Description

teneranean

(i)

Jadual 2

r?#':'; it;ffi::iT*:?, copper in thi s reacti onHitung bitansan *rLj";;,:

i;;rum datam findak baras ini.Jisim anm ielarif. Cu _] 6+l'--.'a"' vL'tt'

l- 6r

0'oz a. )is

61

fi#xn,,it Cdculate the i[Relative uroT.lmotr

of moles of oxygen in the reaction.y,,";;;i;;;;;i.tql^?;,,1),,*),0"00r,,"),"'"[Jis im at o m ie rat if:- ; : ;Zi" ""'--::i:lr--:.]l:-l-1:-li-:::t:_:---:i-- z.:t5.-*=i.a.-,i:ylr:_::::,:o:ii..r,srr.:i:- ;:+,r:iFi-Slii:-q,,t,,..:.ltl.l:t.l

O ,tl-l;(iii)

[1 markJI markahl

?::":T : * "t h e e r n pi ri c a I . form u I a o f c o p per o x i d e. e n t ukan formuta e mpi r ik i;;;i;;r";t oks da4oa a)-5-g - o1,t

I1

I

[2 marks][2 markahl

llihat halaman sebelahJ

Mass (g)Combustion tube + porcelain dishWingporserinCombustion tube * porcelain dish + Copper oxide

&rum ol


6/14

4s47/2

(d) Write a balanced chsmical equation for the reaction in the combustion tube'Tulis.persa*gdt*io vr"g;;;*;;)i uor, tindak baras daram tiub

(e)

pembakararl.

a^O u- [-lr O[2 marklIZ markahl

why is-hydrogen gas passed through the combustion tube after heating hasstopped?Mengapakah gas hidrogen dialirkon merarui tiub pembaknran selepaspemanasan tamat.

(0

t" Y:d Wr:+b f e-'^.u'/,-P CXf-- __> *r o>..& [itr#"r,

state how to determine that ihe reaction between copper oxide with hydrogenhas completed.Nyatakan bagaimana untuk menentukan bahawa tindak balas yang berlskuantara kuprum oksida dengan hidrogen telah lengkap.

l ::*

"ix:;^^(g) state why the empirical formula of magnesium oxide cannot be determine byusing the same teclnique.

Nyatakan mengopaformura empirik-bagi magnesium oksida tidak dapatdi t e n t ulran de n gan mq ig gunakan t e lcn ii v an i, o * o.-.---i. i::i;::.:::-.::1.-_:--1::,.::::_r1rI.;:_]:"'-.=.ri:.r:]T.:.--.:f;;1;.-9;::._::,,:-l-r::I:.::-:_ji_:...--.._ t1

[1 mark]ll markahl

4s4U2ILihat halaman sebelah]


7/14

454u2

Table 3 shows pafis of positive and negative ions.Jadual 3 ntenuniukkan sebahagian ion positif dan ion negatd-

i Positive ionsIon nositif

Negative ionsIon negatif

NameNama

FormulaFormula

NameNams

FormulaFormula

Silver Ag* Chloride CT

Masnesiurn 2+ Oxide o2-

Ammonium NHo* Hydroxide oH-

Lead(II) Pb2* Carbonate Cos2-

Copper(I) Cu* Nitrate NOr-Table 3Jaduol 3

(a) Write the chemical formula forTul is formula kimia b agi

;

(i) Magnesium chlorid e I Magnesium klorida:

Mq c!n."'u'"[1 ma*]- Il markahl

(b) State the name for the compound below,Nyatakan nama bagi sebatian berikut,

[i markl

}markahJ

(i) $EWq61 Ao,rq.dni t*,a Ca/bo*-&[1 mark]fl markahl

copCuu CO::

I markl

ll markah]

4543./2

(i i) f"-^,fdl uYLon^te-

[Lihat halaman sebelahl


8/14

Wherr26.7glead-(It)carbonateisstronglyheateditclecompcsedtolead(lI)bxide and carbon dioxide

gas'

Bila 26.7 g plumbu; jj Fiuonot dipanaskandengan kuat ia ternrai kepada

;;;;;";7ii"oii'io i"n so' \{:'! !'?Y'*= ,u,lumburn (tU u*'uurJr;;?:.iOl,C:12,e = t6)[Relative atomic ma

4':4112

[1 marksllI markah)

[1 marklll markah\

(i)

(ii) Calcirlatc the number ofmol "f l:."9

([l) carbonate used'

H i t un g b il an ga n' * i )'""'i')'i''' r r t I k a'r bi ctn at' y a n g d i gwt a ka n'

?6'1z,b1

(iii) Caiculate the mass of lead (tl) oxideproduced'

H it un g 1 t s t ; ;i;;;;;- i i i r''' a o v a ng t e r has i t'

[1 markltl mcrknh\

(d, x*q*:*:fif,?fH?TL,lifi fi i:jiT ;lH};'!*+,*"Hx;-in'myn#'':{::f:;i'::;#:';:;:::::;;r;;";';;";;n'iu*kt'rida.+',Nog I IY)qCi','*'-'::;" *'cn.'):r ?aT"a.lu.'.:":' " " ' e \i:::il^-

4s41.12

[Lihat halaman sebelah]


9/14

454112

(iit fJased on the answer in 3(b)(i), write the chemical equation for the' reaction.

Berdasarkan jativapan di 3(b)(i), tulis persamaan kimia bagi tindhk

balas itu.

Lv + Ll)"O lv o l-l l-{ ,[1 mark]ll markahJ

(c) (i) write the electron arrangement for the atoms of element w.Tulis susunan elektron bagi atom unsur W '

2.9-(.

Identify the period for the atoms of element WKenal pasti kala bagi atam unsurW.

3

[1 mark]ll markahl

(ii)

[1 mark]ll markahl

(iii)

Z s4^*)^, us"A &v o c J{^{.'...........t1 markl

V and W are placed in the same p6riod in the Periodic Table'Y danW terfetqk dalam knlayang sama dalam Jadual Berkola'

(t Which element, V or W, has the smaller atomic size?'Antara unsut Y danW, manaksh yang mempunyai saiz atorm yang

,. -.-.,.-. -leb.ih -L:ecil? =--=1 n-,'=.; --'

w

Give one reason for the answer in 3(c)(ii)'Beri satu se:bab bagiiawapan di 3(c)(ii)'

-4,

(d)

-:::?::--r i1-r- :-li: ii-!

(ii)

0l

[1 mark]

U mcrkahlState one reason f or the answer in 3(d)(i).Nyataknn satu sebab bagi jawapan di.3(d)(i).

YY'A"... ..?.*.i'l--?g 4- *y-t^

'( , r I{'q {l I\r

-11,^\o-

i1

{{-ot.r,' V.+t" st'-o-'ftg

c)t-^--

f\Jz_-qv -a.N

[2 marks]

4, 12 marknhl

4541.17 [-ihat halaman sebelah]


10/14

)lF

10

4

4541/2

Diagram 4 shows the syrnbols of the atorns of elements U, V and W. The ietters r-tsedare not the actual symbols of the elements.Rgjalt 4 menunjukkan simbol atom bagi unsur-unsur U, V danW. Huruf yang

digunaknn bukan simbol sebenar bagi unsur-unsur itu.

(a)

Diagram 4Rajah 4

U and V are group I elements in the Periodic Table.TJ

danYadalah unsur Kumltulan

Idalam Jadual Berknla.

(i) State the ngmber of valence electrons in the atoms of eiement lJ.Nyatakart bilangan elektron valens dalam o'tam bagi unsur lJ.

I

[1 mark]l1 markahl

What is the physical state of U at room conditions?Apakalt keadaanfizikalU pada keadaan biltk?


11/14

Table 1 shows the proton numbers of elements P' Q and R'jaduat

'l menuniuiknn nomborproton bagi unsur P' Q dan R

Table 5Jadual 5

(a)

(b)

Write the electron arrangement for atom P'

Tulis susunan electron bagi atom P'

a.8 '& r- Ii[1

marklmarkahf

P and Q react to form a comPound'

P dan Q bertindakbalas untwk membentuk satusebafian'

(D What type of bonds formed then i** l.:*lines with atom Q?Apakah ienis ikata:n yang terben'tuk apabila atomP

berpadu dengan

ato:mQ?fl

l6'vr'1 c W-nq[1 mark]

ll markah)

--{i1)--==-what'wi!,l'heppen.to'"at-orr#eduringtho.formation.of.the.cofnpotlr:d..:'.with atom Q? ExPlain whY'

ApaknhyangalranberlakupadaatomPsemasapembentukansebotian

0 denganatt',m

Q?Terangkan kenaPa?

P 8.en^1v' i+-s e v" Q- O +t tcLizve oc!-f

pqx....-. --t'lI / --:(---. 'r Ii1r6\fi11 6i i---/ ./' I{ \ \__..,/ II \;.-/ |\-'' J

[2 marks], [2 markah]

gement of the cornpound formed in s(b)(ii)'

bagi sebatian yang terbentuk di 5(b)(i,raw the

Lukis sus(iii)

{" ,\i;tt*lx12 marksl

[2 markah]

[Lihat halaman sebelah]4s4t/2


12/14

1"3

Q reacts with R to form a compound' Q bertindak balus dengan R untut,

What is the molecular{Apakahformula molekui

What is the relative molecular mass of the[Given that the relative atomic mass of

e:tg ana

Apakah jisim molekul relative bagi sebatian yang terfDiberi bahawajisim molekul relative bagi e : ]9 danR: r.3tt3 +i1 = ttr

..:a.

[l mark]"',

i"I markali)'i

.

Name another compound that has the same physical properties as thecompound formed between Q and R.

Namaknn satu sebstian lain yang mempunyai sifat fizik yang salnoseperfi yang terbentuk antara Q danR.

G*"." 4; a*;&.p / -.t ",J-1A --=[l mark]l1 nqrkahl

(iv) Draw the eleitron arrangement of the compound formed in 5(c)(i).Lukis stlsL.: ten electron bagi sebatian yang terbentuk di 5 (c) (i).

a

[2 marks]

12 markahl

2

@l,/-gs-- 1(a i iY-r/

15s>\/--*\ 'e(G )r4--/ ,1

4s41/2[Lihat halaman sebelah]


13/14

4541,/2

Table 6 shows the electrical conductii,ity and rnerting points of substanc es p, eand x.Jadual 6'menunjukkan kekonduksian erektrik dan taiit rebur bahan p, e dan R.Sutrstancc

Bahan

(it

Bonding llkotan:

Gu^GA+

Electnical co"A,ncti"frntt " st"te ofKekonduksisn elektrik datam keadaan

Table 6

Rajah 6

(i)a) State the types of particles and bonding of substance p.Nyatakan jenis zarah c{an ikstan bagi\ahan p.

Particle / Zarah:

JY'l o l" c"-1,_

[2 marks][2 markahl

nua le


14/14

(c)

15

4s41./?_

State why the electrical conductivity of substance R rs diflerent in solid statecornpared to the rnolten and aqueous states.Nyatakan mengapa kekonduksian elehrik bahan R adalah berbeza dalsmkeadaan pepejal berbanding dengan dalam keada,an leburan dan akueus.

Solid state I Keadaan pepejal:

mt"::* T'': * k, .:!:x :/:kI: l,::Molten and aqueous state I Keadaan leburan dan akueus:

af r

chemistry answer sheet

Documents