schema chemistry trial spm 2007

8/3/2019 Schema Chemistry Trial Spm 2007

1/21

4541/1

Kimia

Kertas 1

Peraturan Pemarkahan2007

PEPERIKSAAN PERCUBAAN

SIJIL PELAJARAN MALAYSIA 2007

KIMIA

KERTAS 1

PERATURAN PEMARKAHAN

UNTUK KEGUNAAN PEMERIKSA SAHAJA

Peraturan Pemarkahan ini mengandungi 2 halaman bercetak

MARKING SCHEME

AMARAN

Peraturan pemarkahan ini SULIT dan Hak Cipta Jabatan Pelajaran Pahang. Kegunaannya

khusus untuk pemerikasa berkenaan sahaja

LOGODAN

NAMASEKOLAH


2/21

PEPERIKSAAN PERCUBAAN SPM TAHUN 2007

PAPER 1 : 50 MARKS.

ANSWERS:

Question No Answer Question No Answer

1 B 26 D

2 D 27 A

3 D 28 C

4 C 29 D

5 B 30 B

6 A 31 B

7 A 32 C

8 D 33 B

9 C 34 C

10 A 35 A11 B 36 C

12 B 37 A

13 C 38 C

14 B 39 D

15 A 40 C

16 C 41 B

17 D 42 C

18 D 43 A

19 B 44 D

20 C 45 C

21 D 46 D22 A 47 C

23 D 48 B

24 B 49 C

25 B 50 D


3/21

SULIT 4541/2

1

PEPERIKSAAN PERCUBAANSIJIL PELAJARAN MALAYSIA 2007

KIMIA

KERTAS 2




AMARAN



4541/2

Kimia

Kertas 2

Peraturan

Pemarkahan

2007

LOGO DAN

NAMA SEKOLAH


4/21

SULIT 4541/2

2

PAPER 2

MARKING SCHEME

SPM TRIAL EXAMINATION YEAR 2007

No Sub Answer Mark

1 (a)(i) - the number of proton in a nucleus- the total number of proton and neutron in a nucleus 11

(ii)S

33

16

1

(iii) S and T 1

(iv) S and T have same number of protons but different

number of neutron. 1

(b)(i) Element C H O

% mass 64.87 13.51 21.62

No. of

mole

64.87/12

= 5.41

13.51/1

= 13.51

21.62/16

= 1.35Smallest

ratio

5.41/1.35

= 4

13.51/1.35

= 10

1.35/1.35

= 1

Empirical formula is C4H10O

1

1

1

(ii) ( 74 )n = 74 / n = 1

-molecular formula is C4H10O

1

1

TOTAL 10

2 (a) 2.8.2 1(b)(i) Ionic bond 1

(ii) -Atom A releases 2 electrons to atom B

- to achieve octet electron arrangement / to form ion A2+.

1

1

(iii) Each ion drawn correctly 1+1

(iv) Has high melting and boiling point 1

(c)(i) CB2 1

(ii) 12 + 2(32) / 12 + 64

76 a.d.p

1

1

TOTAL 10

3 (a)(i) Sodium hydroxide/ potassium hydroxider: formula

1

(ii) 2NaOH + H2SO4 Na2SO4 + 2H2O/ 2KOH + H2SO4 K2SO4 + 2H2O

- Chemical formulae of reactants and products correct 1


5/21

SULIT 4541/2

3

- Equation is balanced 1

(iii) soap 1

(iv) Y 1

(b)(i) W / X 1

(ii) - W is added into sodium carbonate/any metalcarbonate stated in a test tube,

- Gas released turns lime water cloudy

/ - magnesium/zinc is added into W in a test tube,- gas released gives a POP sound with a lighted splinter

1

1

(iii) - W is a strong acid and X is a weak- W completely dissociates in aqueous solution to

produce high concentration of hydrogen ions.

/ X dissociates partially in aqueous solution toproduce low concentration of hydrogen ions.

1

1

TOTAL 10

4 (a)(i) Mg + 2HCl MgCl2 + H2

1. correct formula for the reactants 1m

2. correct formula for the products 1m

3. balance chemical equation 1m 3

(b)(i) Hydrogen gas 1

(b)(ii) 1. Ratio of mol, Mg:H2 is 1:1 1m

2. mol for Mg =24

2.1 / 0.05 - 1m

3. volume of H2 produce = 0.05 x 24 / 1.2 dm 3

/1200 cm 3. 1m3

4(c)(i)

501200

/ 24 cm3/ s 1

20

1200/ 60 cm

3/ s 1

15

1200/ 80 cm

3/ s 1

TOTAL 10

5 (a) ( - ) Magnesium and ( + ) silver 1

(b) - allows movement of ions 1

(c) - magnesium 1

(d) Ag+

+ e Ag 1

(e) - magnesium electrode corroded 1


6/21

SULIT 4541/2

4

- mass of silver electrode increases/ shiny solid deposited 1

(f) 0 to +2 1

(g)(i) - pointer of galvanometer not deflected/ galvanometer

shows no deflection

1

(ii) -glacial ethanoic acid contains molecules only

- does not contain free moving ions/ free ions.

1

1

TOTAL 10

6 (a)(i) Copper and tin 1

(ii) Bronze / alloy 1

(iii) The presence of foreign atomshinder the sliding of atoms on top of each other.

11

(iv) Medals / statues / monuments 1

(b)(i) 2SO2 + O2 2SO3

-formulae of reactants and products correct- balanced equation

11

(ii) Vanadium(V) oxide/ vanadium pentoxide 1

(iii) -Detergent-electrolyte for accumulator

11

TOTAL 10

SECTION B

7 (a) - labelled diagram for heating of substance Q

- labelled diagram for testing of gas R- limewater is labelled

2

11

4

(b)(i)

(ii)

Copper(II) ion

-add ammonia solution and then in excess-blue precipitate soluble in excess ammonia solution

produces a dark blue solution.

1

1

1

3

(c) -heat the solution V until a saturated solution is

produced.- cool to room temperature

-filter the crystal formed

-dry the crystal with filter paper.

1

11

1

4

(d) Magnesium/aluminium/zinc

- blue solution turns pale / colourless

1

1


7/21

SULIT 4541/2

5

/ brown solid deposited 2

(e) -Excess zinc oxide is added into dilute sulphuric acid- filter the mixture/filter

- add sodium carbonate solution into the filtrate/add

sodium carbonate.

- while precipitate produced-filter dan dry the zinc carbonate with filter paper/ filter

and dry.-Equation:

ZnO + 2HNO3 Zn(NO3)2 + H2O

Zn(NO3)2 + Na2CO3 ZnCO3 + 2NaNO3

11

1

1

1

1

17

TOTAL 20

8 (a) Part X hydrophobic/hydrocarbon 1m

Part Y hydrophilic/ionic 1mParx X dissolves in grease 1mPart Y dissolves in water 1m 4

(b) 1.The cloth in experiment II is clean whereas the cloth

in Experiment I is still dirty.

2.In hard water,soap react with magnesium ion3.to form scum

4.Detergent are more effective in hard water

5.Detergent does not form scum6.Detergent are better cleansing agen then soap to

remove oily stain.

[ each points 1m ]

6

(c ) Patient X : Analgeis/anpirin - 1m

Patient Y: Antibiotic/penicillin/streptomycin 1mPatient Z ; Psychotherapeutic / antidepressant 1m 3

(d)(i) Precaution:1.Take after food.

2. Swallowed with plenty of water

Explain:1. Acidic and can cause irritation of the stomach.

2. To avoid internal bleeding/ulceratiion

[precaution 1m]

[explain 1m ] 2

(d)(ii) 1.To make sure all the bacteria are killed /

becomes ill again 1m

2. bacteria become more resistant. 1m3.Need stronger antibiotic to fight the same infection

1m

3

(d)(iii) 1.Drowsiness 1m


8/21

SULIT 4541/2

6

2. poor coordination/light-headedness 1m 2

TOTAL

20

SECTION C9 (a)(i) -heat of combustion is the heat released when 1 mole of

ethanol burnt completely in oxygen. 1

(ii) C2H5OH + 3O2 2CO2 + 3H2O- chemical formulae of reactants and products

correct

- equation is balanced

1

1

(iii) Energy

2CO2 + 3H2O

H = -1376 kJ mol-1

C2H5OH + 3O2

- energy is labeled for the y- axis and energy level

correctly drawn- reactants and product at the correct energy level

1

1

(iv) Relative molecular mass of ethanol = 2(12) + 6 + 16 / 46

Number of mole of ethanol = 2.3/46= 0.05

Heat change = 0.05 x 1376 kJ

= 68.8 kJ /= 68800 J

Temperature increased = 688004.2 x 500

= 32.8oC

Final temperature of water = 28.0 + 33.8= 60.8 oC

1

1

1

1

1

(b) -labelled diagram-arrangement of apparatus is functional

Procedure:

11


9/21

SULIT 4541/2

7

- 200cm3 of water is measured using a measuring

cylinder

- and poured into a copper tin.- The intial temperature of water is measured and

recorded

- A spirit lamp is filled with butanol and weighed- The spirit lamp is light and put under the coppercan.

- The water is stirred continuously with a

thermometer.- When the temperature of water increased by

30oC, the flame is put off.

- The spirit lamp is weighed again- The highest temperature is recorded.

1

1

1

1

11

Results:

Mass of weight of spirit lamp +

butanol /g

Final mass of spirit lamp + butanol /g

Mass of butanol used/g

Highest temperature of water /oC

Initial temperature of water /oC

Increased in temperature /o

C

-results tabulated in table form

-unit stated

11

20

10 a i) A:Propanoic acid and its structureB:Propene and its structure

C:Propane and its structure

22

2

ii) B will decolourise the acidified potassiummanganate(VII) while there is no change for the reaction

of C.

B is able to undergo addition reaction due to the presenceof the double bond.// unsaturated state

C is a saturated compound with no double bonds so no

2

2


10/21

SULIT 4541/2

8

addition reaction can take place.

iii) 2 cm3

of Propan-1-ol is added to 2 cm3

of A in a boilingtube.

The mixture is shaken and about 1 cm3 of concentrated

sulphuric acid is added to it.

The mixture is carefully heated over a low flame forabout 2- 3 minutes.

3

b i) Alkene

CnH2n ( n= 2,3,4.)

1

1

ii) Rajah: Polythene

Manufacture of plactic bagsMaking toys

1

2

iii) Recycle

Reuse

2

20


11/21

SULIT 4541/3 (PP)

4541/3(PP) @ 2007 Hak Cipta Jabatan Pelajaran Pahang

1

PEPERIKSAAN PERCUBAAN

SIJIL PELAJARAN MALAYSIA 2007

KIMIA

KERTAS 3




MARKING SCHEME

TRIAL EXAM 2007

4541/3

Kimia

Kertas 3

Peraturan

Pemarkahan

2007

AMARAN



LOGO DAN

NAMA SEKOLAH


12/21

SULIT 4541/3 (PP)


2

PAPER 3

Question

NumberRubric Score

[Able to write the initial reading, the final reading and the volume of

hydrochloride acid used for experiment I in two decimal points

accurately]

Answer:

1. The initial burette reading = 5.55 cm3

2. The final burette reading = 31.55 cm3

3. The volume of hydrochloride acid used = 26.00 cm3

3

[Able to write any two of the initial reading, the final reading and

the volume of hydrochloride acid used for experiment I inaccurately]

2

[Able to write any one of the initial reading, the final reading and

the volume of hydrochloride acid used for experiment I accurately]1

1(a)

No response or wrong response 0

Question Rubric Score


13/21

SULIT 4541/3 (PP)


3

Number

[Able to construct a table that consists of the following three aspects

with unit correctlt]

Msnipulsted variable

Experiment I and Experiment II

Responding variable

Initial burette reading,the final burette raeding and Constantvariable:the volume of acid used

Sample Answer:

Experiment

Initial burette

reading/

cm3

Final

Burette

reading /

cm3

Volume of

acid / cm3

I 5.55 31.55 26.00

II 2.55 X X 2.55

3


with or without unit correctlt]

Msnipulated variableExperiment I and Experiment II

Responding variable

Initial burette reading,the final burette raeding and Constant

variable:

the volume of acid used

Sample Answer:

Experiment

Initial burette

reading/

cm3

Final

Burette

reading /

cm 3

I 5.55 31.55II 2.55 X

2


with or without correctly]

Msnipulated variableExperiment I and Experiment II

Responding variable

Initial burette reading,the final burette raeding and Constant

variable:

the volume of acid used

Sample Answer:

Initial burettereading/

cm3

Final

Burette

reading /

cm3

5.55 31.55

2.55 X

1

1(b)




14/21

SULIT 4541/3 (PP)


4

Number

[ able to state the three variable correctly]

Manipulated variable:

Type of acids / monoprotic and diprotic acids/ hydrochloride acid

and sulfuric acid

Responding variable:

The volume of acid usedConstant variable:

Volume of acid / volume and concentration of sodium hydroxide

3

[ able to state any two variable correctly]2

[ able to state any one variable correctly]1

1(c)


QuestionNumber Rubric Score

[able to give the hypothesis correctly by stating the following three

aspects]

Manipulated variable:Type of acids / monoprotic and diprotic acids/ hydrochloride acid

and sulfuric acid

Effect that is related to the responding variable:

The volume of acid used

Direction of effect

Different

Sample answer:

The volume of acid used was different when different type of acid

used.

3

[able to give the hypothesis correctly by stating any two of the

following three aspects] 2

[able to give the hypothesis correctly by stating any one of the

following three aspects] 1

1(d)



15/21

SULIT 4541/3 (PP)


5

Question

NumberRubric Score

[able to show all steps how to predict a value for X with two decimal

point and unit correctly]

Answer:

1. The volume of acid used in Experiment I = 26.00 cm

3

2. The volume of acid used in Experiment II = 200.26

/ 13.00 cm3

3. The value of X = 15.55 cm3

3

[able to show two steps how to predict a value for X with two decimal

point and unit correctly] 2

[able to show one step how to predict a value for X with two decimal

point and unit correctly] 1

1(e)


Question

NumberRubric Score

[able to state the direct purpose accurately of why the initial reading

and the final reading of burette must be recorded]

Sample answer:

To determine the molarity of acid used.

3

[able to state the direct purpose correctly of why the initial reading and

the final reading of burette must be recorded]

Sample answer:

To determine the volume of acid used.

2

[able to state indirect purpose correctly of why the initial reading and

the final reading of burette must be recorded]

Sample answer:

state the volume of acid

1

1(f)



16/21

SULIT 4541/3 (PP)


6

Question

NumberRubric Score

[able to give the meaning of the end point accuratelly]

Sample answer:

1. When all hydroxide ions have reacted completely with

hydrogen ion.

3

[able to give the meaning of the end point correctly]

Sample answer:

1. hydroxide ions ,reacted completely with hydrogen ion.

2

[able to give the meaning of the end point ]

Sample answer:

1. hydroxide ions reacted / hydrogen ion reacted

1

1(g)


Question

NumberRubric Score

[able to state three observations correctly]

Sample answer:

1. the pink colour of the solution turned to colourless

2. the final volume of the solution increases.

3. the initial reading of burette in experiment I is 5.55 cm3

4. the final reading of burette in experiment I is 31.55 cm

3

5. the initial reading of burette in experiment II is 2.55 cm3

6. The burette reading increases.

7. The volume of acid in the burette decrease.

3

[able to state two observations correctly]2

[able to state one observations correctly]1

1(h)




17/21

SULIT 4541/3 (PP)


7

Number

[able to show all steps to calculate the molarity of hydrochloride acid

in experiment I correctly]

Sample answer:

1. ratio of mol HCl: NaOH is 1:12. mol of NaOH =

1000

)25(0.2/0.05 mol.

3. molarity of HCl =26

)1000(05.0/1.92 mol .dm

-3/1.9 mol dm

-3.

/2.0 mol dm-3

.

3

[able to show two steps to calculate the molarity of hydrochloride

acid in experiment I correctly] 2

[able to show one step to calculate the molarity of hydrochloride acid

in experiment I correctly] 1

1(i)


Question

NumberRubric Score

[able to make classifying of all three acids correctly]

Sample answer:

Name of acid Type of acid

Ethanoic acid Monoprotic

Hydrochloric acid Monoprotic

Sulphuric acid diprotic

3

[able to make classifying of any two acids accurately] 2[able to make classifying of any one acids accurately] 1

1(j)




18/21

SULIT 4541/3 (PP)


8

Number

[able to give the aim of the experiment accurately by stating]

Manipulated variable based on Diagram 2.1

Pairs of metals

The accurate characteristic that can be detected from the

responding variable based on Diagram 2.1

Potential difference / voltmeter reading.

Sample answer:

To construct the electrochemical series based on the potential

difference between pairs of metals

3

[able to give the aim of the experiment correctly by stating]

General statement of the manipulated variable

Two metals

The accurate characteristic that can be detected from the

responding variable based on Diagram 2.1

voltmeter reading.

Sample answer:

To construct the electrochemical series based on the voltmeter reading

between two metal.

2

[able to give a relevant idea with the aim of the experiment by stating]

The correct manipulated variable.

The correct characteristic but not relevant to the responding

variable

Sample anser:

To compare/to study/defferentiate between pairs of metal

1

2(a)




19/21

SULIT 4541/3 (PP)


9

Number

[able to state three variable correctly]

Manipulated variable

Pairs of metals

Responding variable

Potential difference / voltmeter reading

Constant variableconcentration of electrolyte, copper electrode

3

[able to state any two variable correctly]2

[able to state any one variable correctly]1

2(b)


Question

NumberRubric Score

[able to give the hypothesis correctly by stating;]

The manipulated variable accuratelyPairs of metals

Comparison of the possibility of the accurate effect of the

responding variable

Potential difference/ voltmeter reading

Sample answer:

The further apart the pair of metals in the electrochemical series, the

greater is their potential difference/voltmeter reading

3


The manipulated variable accurately

Pairs of metals

Comparison of the possibility of the accurate effect of theresponding variable

voltmeter reading

Sample answer:

Difference the pair of metals in the electrochemical series, difference

voltmeter reading

2


The manipulated variable accuratelyType of metals

Idea of the comparison of the possibility of the correct effect of

the responding variable

The voltage

Sample answer:

Difference type of metals, difference voltage

1

2(c)




20/21

SULIT 4541/3 (PP)


10

Number

[Able to state complete material and apparatus to obtain the

information about the following three variables.]


Metal P,metal Q, metal R, metal S , metal T, metal U

Responding variable

VoltmeterConstant variable#0.1 mol. dm

-3# sulphate solution of U , beaker ,wires

3

[Able to state complete material and apparatus to obtain any two of

the information about the following three variables.] 2

[Able to state complete material and apparatus to obtain any one of

the information about the following three variables.] 1

2(d)


Question

NumberRubric Score

[Able to state all procedures correctly ]

1. Add/put in sulphate solution of U/ copper(II) sulphate into a

beaker.

2. Dip the pair on metals electrodes into the solution in the beaker.

3. The electrodes are connected to the voltmeter .

4. The reading of the voltmeter is recorded.

5. steps 1 to 5 are repeated using other metal to replaces negative

electrode.

3

[Able to state procedures 1-5 correctly ]2

[Able to state procedures 1-3 correctly ] 1

2(e)



21/21

SULIT 4541/3 (PP)


Question

NumberRubric Score

Able to make labeled tabulation of data with suitable unit that can

give information about the three following variables:



Pairs of metalsResponding variablePotential difference / voltmeter reading

Constant variableU electrode/copper electrode

Sample answer:

Pair of metals Potential difference/

voltmeter reading (V)

Negative terminal of

the cell

P/U 2.7 P

Q/U 2.0 Q

R/U 1.1 R

S/U 0.8 S

T/U 0.5 T

U/U 0.0 -

3

Able to make labeled tabulation of data without unit that give

information about any two of the variables.2

Able to make labeled tabulation of data without unit that give

information about any one of the variables.1

2(f)


schema chemistry trial spm 2007

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