trial penang spm 2013 chemistry k1 k2 k3 skema [scan]

7/27/2019 Trial Penang SPM 2013 CHEMISTRY K1 K2 K3 SKEMA [SCAN]

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MAJLIS PENGETUA SEKOLAH MALAYSIA

CAWANGAN PULAU PINANG

SKEMA JAWAPAN

MODUL LATIHAN BERFOKUS

SPM 2013

KIMIA KERTAS 1

454111

www. myschoolch ild ren .com

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M u a t t ur un ( p er c um a ) s o al anl ai n d i :

M u a

t t ur un ( p er c um a ) s k em al ai n d i



JAWAPAN KIMIA KERTAS 1

1 B 11 D 21 B 31 C 41 A

2 D 12 B 22 A 32 A 42 A

3 D 13 D 23 D 33 B 43 D

4 A 14 B 24 C 34 D 44 A

5 B 15 A 25 C 35 A 45 B,

6 c 16 c 26 B 36 B. 46 B

7 D 17 B 27 D 37 D 47 C

I D 18 C 28 C 38 D 48 C

I A 19 A 29 D 39 B. 49 c

10 c 20 A 30 C 40 B 50 A

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MAJLIS PENGETUA SFKOLAH MALAYSIA

CAWANGAN PULAU PINANG

SKEMA JAWAPAN


SPM 2013

KIMIA KERTAS 2

4541t2

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9t q,$iqlNo

,MarkSdheme AsqMaik

Total

Mark

1 (a) (i) 121 1

(ii) Solid 1 1

(iii) 2X + ZHIO 2XOH + H2

1. Correct chemical formula of reactants and product2. Balanced the equation

1

1 2

1 (b) (i) 191 1

(ii)

I 1 1

1 (c) (i) 6 1 1

( ii) To estimate the age of fossils / artifacts 1 1

1 (d) Both atoms have same number of shells occupied with electrons 1 1

1 (e) Z 1 1

Total 10

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2 (c) Assume the molecular formula of bropeneE(CFlr),

(12+2)n=4214n = 42

n -3

Molecular formula of propene is C3H6

1

1 2

2 (d) (i) 2C3H6

CsHu

9O2 -- 6CO2 + 6H2O ll

I o, --- 3co2 + 3H2o

1.

2;

Correct chemical formula of reactants and products

Balanced the equation1

1 2

(i i) From equation2 mol of C3H6 require I mol of 02

Number of moles of 02 required = 0.4 x 9 = 1.8 mol

Votume of oz required = 1.8 x 24 dm3 ,fuu., dms ll43200 cm3

1

1 2

Total 10

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Wfi'Sti:&r,# tiirIr{itY,d7,

;iffiffii

3 (a) (i) Zinc 1 1

(ii) Zn + 2HNO3 -+ Zn(NO3)2 + Hz

1. Correct chemical formula of reactants and products

2. Balanced the equation

1

1

2

3 (b) Mol HNOa= 2x25 = 0.05

; 1000

Volume H, = 0.025 x24= 0.6 dm3

1

1 2

3 (c) A white precipitate is formed.

The white precipitate dissolves

a colourless solution.': rus ammonia to formn excess aquec

1

1 2

3 (d) (i) Double decomposition II Precipitation 1

'

1

(i i) Zn'* + COs'- -+ ZnCOg 1 1

(iii) Bv filtration 1 1

Total 10

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g-gersX/on Mark Scheme Sub

Mark

Total

Mark

4 (a) (i) P : Sulphuric acidQ : Ammonia

1

1 2

(ii) HzSOa + 2NH3 -+ (NHa)2SOa

1. Correct chemical formula of reactants and product2. Balanced the equation

1

1 2

(iii) As a fertilizer 1 1

4 (b) (i) Carbon 1

(ii) 1. Correct arrangement of the particles in pure iron2. Correct arrangement of the particles in steel

.r:' ::i:'- i:' ::,1f'::

Pure iron Steel

1

1 2

(iii) 1. The presence of foreign/carbon atoms disturb the orderlyarrangement of pure metal atoms

reduce the sliding of the atom layers when force is applied.

1

1 2

Total 10

#ui,';+l;,i;1:.r.!: :tr?*!.4;

f.#.ji*i-i.:!:j

ffi:.-wt$l('id ll,:,irt;t ;' a,: I rr

i-,i44i2irh'r 'irirl

5 (a) Average rate"= 36 = 0.3 cm

120

1 1

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s (b) 1. x-axis: time/s , y-axi ---

2. consistent scale and the graph is half of the graph paper size

3All

thepoints

are transferred correctlySample answer

1l1l113

5 (c) 1. Gradient of curve for the experiment ll is lower nanand

time taken for reaction to complete is more tha2. The volume of gas for experiment ll is half of experiSample ansWer:

experiment I

n 120snent I

f-Imsi!r.

1

1 2

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TemperaturePresence of catalyst

-s.F.6taffi

ffiffi+!iH#46v-tt:tliili#:,Y#1tr{rPi?

6 (a) (i) Soap: Potassium palmita6Substance X: Glycerol

--

1

1

ffi,iqffieBPtyi

2

(ii) Saponication1 1

(iii)1 1

(iv) 1. Soap ions reactwith C@2. To produce insolubie satt / scum

1

1 2-

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6 (b) T . Flavouring agentU: Acacia qum ll Pectin // Gelatine

1

1 26 (c) X

Y

AntibioticPqrchotherapeutic med ici ne

1

1 2

Total 10

,'',S.d/b-.

t,,,',

'Titai,l

M,bik

7 (a) VandYHave same proton number but different nucleon number

1

1 27 (b) 1

2

34

7 valence electronsGroup 17

Three shells occupied with electronsPeriod 3

1

1

1

1 47 (c) 1. lonic compound

2. Any two:. Can coMuct electricity in motten or aqueous state. High melting / boiling point. Soluble in water // lnsoluble in organic solvent

1

1

1 3

7 (d) (i) W * Vz ------>WV, 1 1

( ii) 1. Electron arrangement of atom V is 2.8.7 andatom W is 2.8.2

2. Atom W donates two valence electrons3. To achieve stable octet electron arrangement4. Form ion Wz* tt W _> W2* * 2e5. The electrons are transferred to two atom V6. Atom V accepts one etectron7. Form V- ion ll V + e ----> V-

B. V- and W2* are attracted together by a strong electrostaticforce

9. lonic compound of WV2 is formed10. Diagram. CorLct number of electrons in each shell. Label ion and show charges

]'

1

1

1

1

1

1

1

1

1

1 10

Total 20-

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QuesliqnNo

Mark Scherne Sub

-Mark

Total

Mark

8 (a) 1. Turns blue litmus paper red

2. Reacts with metals that are more electropositive than hydrogen toproduce salt and hydrogen gas

3. Reacts with bases and alkalis to form salt and water

[Note: Accept any suitable answer]

1

1

1 3

B (b) 1. Ethanoic acid is a weak acid while nitric acid is a strong acid2. Ethanoic ionises partially in water to produce lower concentration

of hydrogen ions

3. Nitric acid ionises completely in water to produce higherconcentration of hydrogen ions

4. Higher concentration of hydrogen ions, pH value is lower

1

1

1

1 4

B (c) 1. Ammonia in chloroform exists as molecules2. There are no hydroxide ions present

3. Ammonia ionises partially in water to produce hydroxide ion.4. NHs + HzO -+ NHc* + OH-

5. The presence of OH- ions makes the solution alkaline'

1

1

1

1

1 5

B (d) (i) A solution which has a known concentration 1 1

( ii) 1. Mol KOH = 0.1 x 250 11000 = 0.025

2. Mass KoH

= ?.lrrt

- (3e + 16 + 1)

3. Put 1.4 g of KOH in a beaker and pour a small amount of distilled:

water.4. Stir the solution until all solid KOH dissolves5. Transfer the solution of KOH into the volumetric flask.6. Distilled water is added into the solution in the flask until the

graduation mark 250 cm3.

7, itre ttast is ctosed tightly with the stopper and the content is

1

1

1

1

1

1

1 7

Total 20

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Able to label Diagram g with tne

solutions.

Answer

lron(lll) nitratesolution

J nitrate

solutlon

J nitrate solution

Porous pot

lron

lron(lll) nltrate

solution

Porous pot

Note:

* J would be zinc // aluminium llmagnesium //

* J solution woutd be any soluble satt of zinc ltsoluble satt ofaluminium // soluble salt of magnesium

t lron solution would be any solubte salt of iron

1. Corect label for porous pot and iron

2. ,Correct label for 2 solutions

3. Correct label for J

Able to show the direction of'electron flow on Diagram g

AnswerFrom J electrode to iron electrode

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(ii) Abte to write the half equatlon for the postti\re termmalAnswer

1. Correct formula of reactant and product

2. Balanced equation

ZH* + 2e' _+ H2

1

1 2

(iii) Able to state the negative terminalAnswerJ ll zinc // aluminium ll magnesium

Able to explain why the electrode is chosen as negative terminalAnswerJ I zinc / aluminium / magnesium is more electropositive //

Position of J I zinc I aluminium / magnesium is above iron in theelectrochem ical series

Able to state the observation at negative terminal.AnswerJ I zinc / aluminium / magnesium electrode dissolves / becomesthinner

Able to explain the answer.Answer

U ztnc taluminium / magnesium atom releases etectrons to form J /zinc laluminium / magnesium ion

1

1

1

1

4

e(b) Able to list the apparatus and materialsAnswer

1. lron ring, silver plate, silver nitrate / sulphate / chloridesolution, wires, cells, beaker

* Beaker and wires can be referred to the labelled diagram orstated in the procedure

Able to list the steps in the procedure

Answer:

2. Clean the iron ringl

3.Poursitvernitrate/sulphate/chloridesotutionintothebeaker

4. Silver plate as anode ll ironring as cathode //5. Both electrodes are immersed in the electrolyte /l6. The switch is closed // complete the circuit

1

1

1

1

1

1

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Able to write half equation at the anode a.nd cathodeAnswer

9. Anode ll anod: Ag --, Ag* + e10. Cathode tt katod: Ag* * e' -' Ag

1

1

1

1

10

Total 20

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(iii) 1.

2.

3.

Hexene is unsaturated hydrocarbon

Hexane is saturated hydrocarbonHexene can react with bromine while hexane cannot

1

1

1 3

10 (b) List of materials:Ethanol, ethanoic acid, concentrated sulphuric acid

[Note: Accept any alcohol or carboxylic acid]

Procedure of the experiment:1. (2-5) cm3 of ethanol is poured into a boiting tube2. (2-5) cm3 of ethanoic acid is added

3. 3 drops of concentrated sulphuric acid is added4. The mixture is heated carefully and boiled slowly about 2 to 3

minutes.5. The contents of the boiling tube is poured into a beaker

containing water.

Observation and chemical equation:

Fruity smell substance is produced

C2H5OH + CH3COOH --) CH3COOCzHs

Name of the ester produced:

Ethyl ethanoate

2

1

1

1

1

1

1

1

1 10

Total 20

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MAJLIS PENGETUA SEKOLAH MALAYSIACAWANGAN PULAU PINANG

SKEMA JAWAPAN


SPM 2013KIMIA KERTAS 3

4541t3

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JAWAPAN KIMIA KERTAS 2

Question Marks Scheme Marks

1(a) Able to state all the voltmeter readings accurately with correct decimalplace and unit

Sample answer:WandCu:2.8VXandCu:0.8VY and Cu : 1.4 VZandCu:0.4V

3

Able fo sfafe at leasit three voltmeter readings accurately without unit orwith unit but wrong decimal place

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Sample answer:

W and Cu : 2.8 ll 2,80VX and Cu : 0.8 // 0.80 V

Z and Cu : 0.4 ll 0.40V

2

Able to state at least two readinqs correctlv without unit 1

No response or wronq response 0


1(b) Able to state the relationship between the manipulated variable and the

responding variable with direction.

Sample answer:The further the distance between two metals in the electrochemicalseries, the bigger is the voltage value.

5

Able to state the relationship between the manipulated variable andresponding variable

Different pair of metals have different:voltage value

2

Able to state the idea of hypothesis

Sample answer:Pair of different metals shows vottmeter reading

.i:.

1

No response or wrono response ',0

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1(c) Able to construct a table to record the voltmeter reading for each pair of

metals that contain:1. Correct titles with unit2. Correct readings

Sample answer

Pairs of metals Voltaqe / V

W and Cu 2.8

X and Cu 0.8

Y and Cu 1.4

Z and Cu 0.4

3

Able to construct a less accurate table that contains:

1. Tittes without unit2. At least two correct readings

2

Able to construct a table with at least one title and one readinq 1

No resoonse or wrono resoonse 0


1(d) Able to state all the three variables correctly

Sample answer:

Manipulated variable: Pairs of metals// negative terminal

Responding variable: Voltmeter reading ll VoltageConstant variable: Copper electrode, copper(ll) sulphate solution

3

Able to state anv two variables correctlv 2

Able to state anv one variable correctlv 1

No resoonse or wrono resoonse 0


1(e) Able fo sfafe the correct operational definition for the position of metals

in the electrochemical sen'es.

Sampte answer:

When the voltnneter reading of two metals dipped in an electrolyte is

blgger, the position between the two metals in the electrochemical

series is further apart. I

3

Able fo stafe the position of metals in the electrochemicalsen'es

Sample answer:

The further the distance between two metals in the etectrochemical

series, the voltmeter reading is bigger

2

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Able fo sfafe an idea of positioi

Sample answer:

Position of metals is influencedDifferent metals shows different

of metals

by voltage //voltmeter reading

1

0

Marks SchemeAble to state all the co

Sample answers:

After 20 minutes Observations lnferences

At tne negative terminal Electrodedissolves /becomes thinner

The metal atomsrelease electrons toform ions

At the positive terminal Electrodebecomes thicker

The copper(ll) ionsaccept electrons toform coDDer atoms

Copper(ll) sulphatesolution

lntensity of bluesolution decreasesll Blue solution

turns pale blue

Concentration ofCu2* ions decreasesll Cuzn ions are

discharged to formcopper atoms

Able to state ani

4Ple to state any four

4Pleto state any thi

Able to state two correqt observations ffiAble to state anyNo response or wrong respans-

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Question Marks Scheme Marks1(h) Able to predict the three positive terminals and three vortage

values forall

pairsof metals correctly

Sample answer:

Pair of MetalsPasangan logam

Positive TerminalTerminal Positif

Voltage / VVoltan / V

WandX X 2.0

XandY X 0.6

W andZ Z 2.4

6

Able to state any five correct positive terminals and voltage 5

Able to state any four correct positive terminals and voltage 4

Able to state any three correct positive terminals and voltage 3

Able to state any two correct positive terminals and voltage 2

Able to state any one correct positive terminal and voltage 1

No response or wrong response 0

Question Marks Scheme Marks1(i) Able to classify all the four substances correctly

Sample answer:

Can be made as electrolvte Cannot be made as electrolvteSodium chloride solutionDilute sulphuric acid

Glucose solutionGlacial ethanoic acid

3

Able to classify any three substances corectlv 2

Able to classify anV two substances correctly 1

No response or wrono response 0

Question ' Marks Scheme Marks2(a) Able fo sfafe the problem statement accurately.

Samole answerWhat is the effect on rusting when iron is in contact with other metals?ll How do different types of metals in contact with iron affect rusting?

3

Able fo sfafe the problem statement but less accurately.

Samole answerWhat is the effect of other metals on rusting?ll To investiqate the effect of different metals on the rustinq of iron.

,2.

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Abte to give a,i idea of stateient of the problem

Sample answer:How rusting occurs?ll To investigate the effect of metals on rustingll To investigate rusting

1


Question Marks Scheme Marks2(b\ Able to sfafe all variables correctly:

Sample answer: '

@riabte:DifferenttypesofmetalsincontactwithironResponding variable: Rusting of iron ll tron rusts or does not rust

ll Formation of blue colouration/spotFixed variable: lron nails // Electrolyte/(name) ll Aga/Jelly solution //

Temperature

3

Able to state any two variables correctlv. 2

Able to state any one variable correctlv. 1


Question Marks Scheme Marks2(c) Able to state the relationship between the manipulated variable and the

responding variable with direction correctly:

Sampte answer:A more electropositive metal will prevent iron from rusting while a lessetectropositive metat witl speed up rusting of iron.

3

Able to state the relationship between the manipulated variable and theresponding variable,

,

Samole answer:

[Mg /Al /Zn] speeds up iron nail rusting while [Sn / Pb / Cu] slowsdown rusting.// A more electropositive metal will prevent iron frorn rusting.

// A less electropositive metal will speed up nisting of iron.

2

Able fo sfafe an idea of hypothesr,s:

Samole answer:

[Name suitable metalJ affects the rusting of iron.

1


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Question Marks Scheme Marks2(d) Able to give a complete list of materials and apparatus that irwoi,fues tne

following.

1. lron nails2. 1 metal above iron in electrochemicalseries3. 1 metal below iron in electrochemicalseres4. A suitable electrolyte, test-tubes, sand paiper

Sample answer:lron nails, magnesiumlzinclaluminium strip, tin/copper/lead/silver strip,hot jelly containing potassium hexacyanoferrate(lll) solution, test tubes/boiling tubes, sand paper

3

Able to give a list of materials and apparatus that invotves iite followng:1. 1 metal above iron in electrochemicalseries

2. 1 metal below iron in electrochemicalseries3. Any suitable electrolyte, any suitable container

2

Able to give a list of materials and apparatus that involves the fdllowing:1. 1 metal above/below iron in electrochemical series //

any su itable electrolyte.2. Any container

1


Question Marks Scheme Marks2(e)

Able to state the following 6 sfeps;1. [Clean iron nails and metal sfnps With sand papei]2. [Coil the iron nails with the metats]3. [Place the iron nails in separate container]4. [Pour/add/fill the [electrolyte] into the containerl5. [Leave them aside for several days]6. [Record your obseruation]

Sample answer:1. clean iron nails, magnesium ribhon and copper strip with sand

:

paper.

2. Coit two iron nails tightly with magnesium ribbon and copperstrip.

3. Place all the iron nails in separate test tubes.4. Pour the hot jelly containing potassium hexacyanoferrate(lll)

5. Keep the test tubes in a test tube iack and leave lhem aside forseveral days.

6. Record your observations,

3

Steps 2,4,6 2Step 2[coil iron nail with Mg/Cu], 4 1

No response or wrono response 0

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Question Marks Scheme Marks2(f) Able to exhibit the tabulation of data that includes the following four

information

1. Heading for the manipulated variable ; Sef // Pair of metals2. Examples of Sets // Pair of metals t l, ll // Mg-Fe, Cu-Fe3. Heading for responding variable : Obseruation4. 2x3 or 3x2 table

Sample answer:

Set /l Pair of metals ObservationI // Mq-Fe

ll ll Cu-Fe

2

Able to exhibit the tabulation of data that includes the following twoinformation

1. 1/3 from score 22. 2x2 table

Saniple answer:

Set // Pair of metals Observation

1


flee .l papels, fre* skeine ai , vilvw.mys';hocici"iildien.ron'r

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trial penang spm 2013 chemistry k1 k2 k3 skema [scan]

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