Analysis [4541/1] [4541/2] Chemistry [4541/3] http ......SOALAN ULANGKAJI SPM 2012 109 JAWAPAN boleh didapati di laman web Chemistry Paper 1 [4541/1]1. Diagram 1 shows the electron

108 SOALAN ULANGKAJI SPM 2012

JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

ChemistryAnalysis

[4541/1][4541/2][4541/3] http://cikguadura.wordpress.com/

109 SOALAN ULANGKAJI SPM 2012JA

WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

Chemistry Paper 1 [4541/1]

1. Diagram 1 shows the electron arrangement of an atom of element P.

Diagram 1

What is the number of valence electrons in atom P ?

A 7 C 5 B 6 D 4

2. What are the symbols of the elements of chromium, copper , manganese and potassium?

A B C D

3. The following statement is about the arrangement of the elements in the Periodic Table of Elements.

Which of the following scientists made the above statement?

A Meyer C Mendeleev B Newlands D Dobereiner 4. Diagram 2 shows the set-up of the apparatus for electrolysis.

Diagram 2 Which of the following compounds could be used as

substance X?

A Ethene, C2H4 B Sodium chloride solution, NaCl C Chloromethane, CH3Cl D Ethyl ethanoate, CH3COOC2H5

P

5. What are the ions present in molten sodium chloride and sodium chloride aqueous solution?

A B C D

6. Which of the following solutions can show a pH value of 8?

A 0.1 mol dm-3 of ethanoic acid B 0.1 mol dm-3 of hydrochloric acid C 0.1 mol dm-3 of ammonia solutio D 0.1 mol dm-3 of sodium hydroxide solution

7. Which of the following compounds is a soluble salt?

A Lead(II) iodide B Barium sulphate C Calcium chloride D Magnesium carbonate

8. Diagram 3 shows the stages involved in the Contact Process to produce sulphuric acid.

Diagram 3

Which of the following represent the temperature and the catalyst in stage 1?

A B C D

9. Which of the following compounds is an organic compound?

A Calsium carbonate, CaCO3 B Carbonic acid, H2CO3 C Carbon dioxide, CO2

D Glucose, C6H12O6

Temperature / oC Catalyst450 Vanadium(V) oxide200 Vanadium(V) oxide450 Iron powder300 Iron powder

Elements are arranged in order of increasing atomic mass in The Periodic Table

http://cikguadura.wordpress.com/


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

10. Diagram 4 shows the graph of volume of carbon dioxide gas against time when 5 g of marble chips is added to 50 cm3 of 0.2 mol dm-3 hydrochloric acid.

Diagram 4 At what time the rate of reaction the highest? A t1 B t2 C t3 D t4

11. Which statement is correct about noble gases? A Exist as diatomic molecules B Do not form chemical bonds C Form ions with different valencies D Combine with transition metals to form coloured

compounds

12. Which of the following substances has electrostatic forces between its particles?

A Naphthalene C Hydrogen chloride B Carbon dioxide D Magnesium oxide

13. Acid rain causes the land to become acidic. Farmers neutralize the acidity in the soil by adding

A lime C zinc nitre B sulphur D ammonium sulphate

14. Atom of element X has a proton number of 13. Where is X located in the Periodic Table of Elements?

A B C D

15. Which of the following substances is made up of atoms? A Argon C Chlorine B Nitrogen D Ammonia 16. Diagram 5 shows two examples of medicine Y

PenicillinStreptomycin

Diagram 5

What is type of medicine Y A Hormon B Analgesic C Antibiotic D Psychotherapeutic medicine

Group Period3 23 3

13 213 3

17. Diagram 6 shows the set up of apparatus to determine the empirical formula for metal oxide.

Which of the following metals is most suitable to be used in the diagram 6?

A Lead C Copper B Silver D Magnesium 18. Diagram below shows the formula of a nitrate salt

Which of the following are the possible ions of X? I Silver ion III Carbonate ion II Hydroxide ion IV Ammonium ion A I and III only C II and III only B I and IV only D II and IV only 19. Baking powder contains sodium hydrogen carbonate. It

reacts with acidic substances to release A hydrogen C carbon dioxide B nitrogen D nitrogen dioxide

20. A study of three metals M, N and O is carried out. It is found that metal M has the highest tendency to lose electron while metal O has the least tendency. It can be summarised as below:

Which of the following statements are true of the metals M, N and O?

I M displaces N from aqueous N nitrate II M will corrode if placed in contact with O in aqueous

M nitrate III N is the positive terminal in a chemical cell using both

N and O as electrodes IV The voltage for chemical cell using M and O is bigger

than chemical cell using N and O. A I, II and III only C I, III and IV only B I, II and IV only D II, III and IV only

21. Which of the following solutions have the same number of hydrogen ions, H+, as in 50 cm3 of 0.1 mol dm-3 sulphuric acid, H2SO4?

I 100 cm3 of 0.1 mol dm-3 hydrochloric acid, HCl II 50 cm3 of 0.2 mol dm-3 nitric acid, HNO3

III 100 cm3 of 0.1 mol dm-3 ethanoic acid, CH3COOH IV 50 cm3 of 0.1 mol dm-3 phosphoric acid, H3PO4

A I and II only B I and III only C III and IV only D I, II and III only

XNO3

Volume of CO2 gas / cm3

Diagram 6


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

22. Diagram 7 shows molecular structure of a polymer.

Diagram 7 What is the name of the monomer of the polymer in the

diagram?

A Ethene C Propene B Butene D Chloroethene

23. Table 1 shows the relative atomic mass of helium, carbon, sulphur and copper

Table 1 Which of the following statements is true? [ Avogadro constant = 6.0 x 1023 mol-1] A Mass of one copper atom is 64 g B Mass of 1 mol of helium is 8 g C 32 g of sulphur contains 6.02 x 1023 sulphur atom D Mass of one sulphur atom is 32 times bigger than one

carbon atom

24. Iron(III) ions can be reduced to iron(II) ions by substance X. Which of the following is substance X?

A Zinc B Chlorine water C Acidified potassium manganate(VII) solution D Acidified potassium dichromate(VI) solution

25. Diagram 8 shows the apparatus set-up used to study the rate of reaction of calcium carbonate and hydrochloric acid.

Diagram 8The rate of the above reaction can be increased by

A grinding the marble chips B lowering the temperature of hydrochloric acid C using a larger flask D adding water to hydrochloric acid

26. Diagram 9 represents the structural formula of a carbon compound.

Diagram 9 Which of the following alcohol reacts with propanoic acid to

produce the above compound?

A C

B D

27. What is the oxidation number of nitrogen in NO2?

A +2 B +3 C +4 D +6 28. A student discovered that a green apple that was cut into

smaller pieces turned brown after 15 minutes. Which of the following substances should be added to prevent the browning of apple.

A Ascorbic acid B Sugar C Alcohol D Lechitin

29. The following statement is about X3+ ion.

Which of the following proton numbers and nucleon numbers shows for atom X?

A B C D

X3+ ion has 14 neutrons and 10 electrons.

Proton number Nucleon number10 1410 2713 1413 27


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

30. Diagram 10 shows the electron arrangement of a compound formed between element T and element Q.

Diagram 10

What group in the Periodic Table of Elements is element Q located?

A 2 C 16 B 8 D 18

31. Which of the following pairs of substances is most suitable to prepare copper(II) sulphate salt?

A Copper with dilute sulphuric acid B Copper(II) chloride with dilute sulphuric acid C Copper(II) carbonate with dilute sulphuric acid D Copper(II) nitrate solution with sodium sulphate

solution

32 Diagram 11 shows the set-up of apparatus of an electrolysis process.

Diagram 11

Which of the following electrolytes produce oxygen gas at electrode X ?

I 1.0 mol dm-3 hydrochloric acid II 1.0 mol dm-3 sulphuric acid III 1.0 mol dm-3 potassium nitrate solution IV 1.0 mol dm-3 potassium bromide

A I and II only C III and IV only B II and III only D II, III and IV only 33. The following equation represents the reaction between

sodium hydroxide solution and dilute sulphuric acid.

H2SO4 + 2NaOH → Na2SO4 + 2H2O

What is the volume of 0.5 mol dm-3 sulphuric acid needed to neutralise 50 cm3 of 0.5 mol dm-3 sodium hydroxide?

A 12.5 cm3 C 50.0 cm3

B 25.0 cm3 D 75.0 cm3

34. Which of the following statements explains why ceramic is suitable to make an engine block?

A Ceramic is chemically inert B Ceramic is an electric conductor C Ceramic can withstand high temperature D Ceramic has a low specific heat capacity 35. Table 2 shows the proton number of elements S, T, U and V.

Table 2

What is the arrangement of elements S, T, U and V in ascending order of atomic size?

A S, T, U, V B S, V, T, U C V, U, T, S D U, T, S, V 36. C4H8 is the molecular formula for isomers X and Y. Which of the following statements is true of isomers X and

Y?

A X and Y have similar molecular structure B X and Y have similar chemical properties C X and Y have different relative molecular mass D X and Y have similar physical properties

37. Diagram 12 shows curve X obtained when 8 g of granulated zinc (in excess) is reacted with 50 cm3 of 1 mol dm-3 sulphuric acid.

Diagram 12

Which of the following reactions produces curve Y?

A 8 g zinc powder + 50 cm3 of 2 mol dm-3 sulphuric acid B 8 g zinc powder + 50 cm3 of 1 mol dm-3 of sulphuric

acid C 8 g granulated zinc + 100 cm3 of 1 mol dm-3 of

sulphuric acid D 8 g granulated zinc + 50 cm3 of 2 mol dm-3 of sulphuric

acid


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

38. The following statements are about atom G and J. • ElectronarrangementofatomGis1 • ProtonnumberofatomJis6

What is the formula of the compound formed between G and J?

A JG C J4G B JG2 D JG4

39. Caffeine is found in coffee bean. Its molecular formular is C4H5N2O. If one coffee bean contains 0.02 mol of caffeine, determine the mass of the compound in ten coffee beans

[Relative Atomic Mass ; C, 12 ; H, 1 ; N, 14 ; O, 16] A 0.97 g C 9.70 g B 1.9 g D 19.4 g

40. 7 g of potassium hydroxide is dissolved in distilled water to form 250 cm3 of solution. What is the molarity of the potassium hydroxide solution?

[Relative Atomic Mass: H,1 ; O,16 ; K, 39]

A 0.03 mol dm-3 C 0.30 mol dm-3

B 0.05 mol dm-3 D 0.50 mol dm-3

41. Table 4 shows the proton number of element X and Y.

Table 4 Which of the following is true for compound formed

between X and Y?

Bonding type Electrical conductivity A Ionic in aqueous and molten state B Covalent in aqueous and molten state C Covalent in aqueous state only D Ionic in molten state only

42. Table 5 shows the results of an experiment for three chemical cells P, Q and R.

Table 5 Which of the following arrangements of metals X, Y

and Z is in descending order of electropositivity in the electrochemical series?

A Z, X, Y C X, Y, Z B Z, Y, X D X, Z, Y

43. Diagram 15 shows curve W obtained from the decomposition of 20 cm3 of 0.40 mol dm-3 hydrogen peroxide solution, H2O2, using 0.2 g of manganese (IV) oxide as catalyst at a temperature of 30 0C.

Diagram 15

Which of the following experiments will produce curve X?

A B C D

44. Table 6 shows the melting and boiling points of substances P, Q, R and S.

Table 6 Which of the following substances has the highest kinetic

energy at room temperature? A P C R B Q D S

45. The following equation shows the complete combustion of propene gas.

C3H6(g) + 9/2 O2(g) → 3CO2(g) + 3H2O(g)

Which of the following statements are true when 1 mol of propene gas is burnt completely?

[Relative atomic Mass : C3H8 , 44 ; O2 , 32 ; CO2 , 44 ; H2O, 18, Molar volume of gas 22.4 dm3 mol–1 at S.T.P.]

I Complete combustion of 0.1 mol of propene produces 5.4 g of water

II Complete combustion of 1 mol of propene gas produces 2 mol of water

III Complete combustion of 4.2 g of propene requires 14.4g of oxygen.

IV Complete combustion of 0.1 mol of propene produces 6.72 dm3 carbon dioxide gas at s.t.p.

A I and II only C II and IV only B I and IV only D I, III and IV


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

46. Ammonium sulphate, (NH4)2SO4 is an example of a fertilizer. Calculate the percentage of nitrogen in 1 mole of ammonium sulphate.

[Relative Atomic Mass: N, 14 ; H,1 ; S,32 ; O,16]

A 12.12 % B 21.21 % C 23.23 % D 31.31 %

47. Diagram 16 shows an apparatus set up to investigate a redoxreaction by tranferring electrons at a distance.

Diagram 16

In this reaction, electron flow from electrodee P to electrode Q. Which of the following are the correct solution for P and Q?

A B

C

D

Solution X Solution Y

Bromine water Iron(II) sulphatesolution

Bromine water Potassium iodidesolution

Acidified potassiumdichromate(VI)

solution

Potassium iodidesolution

Potassium iodidesolution

Acidified potassiumdichromate(VI)

solution

48. Metal M forms a chloride compound with the formula MCl3. Given the formula of chromate (IV) ions is CrO4

2-, then the formula of M chromate is

A MCrO4 C M(CrO4)3 B M2CrO4 D M2(CrO4)3

49 Diagram 17 shows the process to produce compound J.

Diagram 17 Which of the following structural formulas is of compound

J?

O || CH3—C—O—CH2—CH3

O || CH3—C—O—CH2—CH2—CH3

O || CH3—CH2—C—O—CH2—CH3

O || CH3—CH2—C—O—CH2—CH2—CH3

50. The empirical formula of a hydrocarbon is CH2. Its relative molecular mass is 56. What is the molecular formula of the hydrocarbon?

[Relative atomic mass: H, 1; C, 12 ]

A. C3H8 B. C4H8 C. C4H10 D. C5H10

A

B

C

D


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my


SECTION AAnswer All Questions

1. Diagram below shows an industrial preparation of compound Y from the product of Contact process and Haber process.

Contact process

Haber process

Sulphuric acid

Compound X

Compound Y

(a) State the name of compound X. _____________________________________________________________________ [1 mark]

(b) Write the formula of compound Y. _____________________________________________________________________ [1 mark]

(c) Sulphur dioxide, SO2 is one of the product of the Contact process that can cause acid rain. State one effect of acid rain to the environmental.

_____________________________________________________________________ [1 mark]

(d) Urea, (NH4)2CO and compound Y are two type of fertilizers. (i) Calculate the percentage of nitrogen by mass in both fertilizers. [Relative Atomic Mass ; H, 1 ; C, 12 ; N, 14 ; O, 16 ; S, 32] _____________________________________________________________________ [2 marks]

(ii) Which fertilizers is a better for the growth of plants? Explain why. _____________________________________________________________________ [2 marks]

(e) Sulphuric acid is one of the raw materials to produce synthetic polymers. However synthetic polymers are difficult to dispose.

(i) Why we cannot burn the synthetic polymer? _____________________________________________________________________ [1 mark] (ii) State one way to overcome the problem in (e)(i). _____________________________________________________________________ [1 mark]



JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

2. Diagram below shows the graph of temperature against time when solid of P is heated.

Time/s

Temperature/oC

63

259

A

B C

D E

F

(a) What is meaning of melting point? _____________________________________________________________________ [ 1 mark ]

(b) State the melting point and boiling point of substance P.

Melting point : ________________________________________________________ Boiling point : ________________________________________________________ [2 marks]

(c) Explain why temperature unchanged at BC? _____________________________________________________________________ [ 1 mark ]

(d) Complete the table below by stating the physical state of substance P.

[2 marks]

(e) Table below shows the melting point and boiling point of four substances.

(i) What is the physical state of R and S at room temperature? R : _______________________________________________________ S : _______________________________________________________ [2 marks] (ii) Draw the arrangement of particles of T at room temperature.

[ 1 mark ]


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

3. Diagram below shows the chemical change occurred in copper compound.

II

I

III IV

Copper(II) carbonate

Copper(II) oxide

Copper metal

Copper(II) sulphate solution

(a) Copper(II) carbonate is converted to copper(II) oxide in reaction I. (i) State the colour of copper(II) oxide. _____________________________________________________________________ [1 mark] (ii) Write the chemical equation for the reaction I. _____________________________________________________________________ [2 marks]

(iii) 4.0g copper(II) oxide is produced from the reaction I. Calculate mass of copper(II) carbonate used? [Relative Atomic Mass : Cu, 64 ; O, 16 ; C, 12]

[2 marks]

(b) Copper metal can be changed to copper(II) sulphate solution in process III and then to copper(II) carbonate in process II. (i) Name the process II. _____________________________________________________________________ [1 mark] (ii) Suggest the substances that used in process II and process III. Process II :___________________________________________________

Process III :___________________________________________________ [2 marks] (c) Copper(II) oxide can be reduced to copper metal by passing the dry hydrogen gas. Draw a labeled diagram how to produce

copper metal from the copper(II) oxide in the lab.

[2 marks]

4. Equation below shows the energy release from the reaction of iron and copper(II) sulphate solution. (Relative Atomic Mass : Cu, 64 ; Water heat specific capacity, 4.2 Jg−1 OC−1)

(a) Name the reaction represented by the equation above? _____________________________________________________________________ [1 mark]

Fe + CuSO4 ⎯→ Cu + FeSO4 ΔH = −200kJmol−1


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

(b) What meant ΔH = −200kJmol−1 from the equation above? _____________________________________________________________________ [1 mark]

(c) Draw the energy level diagram for this reaction.

[3 marks]

(d) If excess iron powder is added to the 100 cm3 copper(II) sulphate solution 0.25 moldm−3, calculate: (i) Temperature rise from this equation.

[3 marks]

(ii) Mass of copper formed.

[1 mark]

(e) If iron powder is displaced by magnesium powder, predict the value of ΔH whether higher or lower than 200 kJmol−1. Explain why?

____________________________________________________________________ ____________________________________________________________________ [2 marks]

(f ) Name one another metal that cannot displace copper from copper(II) sulphate solution. _____________________________________________________________________ [1 mark]

5. Diagram above the structural formula of organic compound, P. (a) Name the compound P. _____________________________________________________________________ [1 mark]

(b) When compound P is burnt completely in excess oxygen, 5.4g of water produce. (i) Write the equation for the combustion of compound P in excess oxygen. _____________________________________________________________________ _____________________________________________________________________ [2 marks]

(ii) Calculate the mass of compound P used? [Relative Atomic mass: C, 12 ; H, 1]

[3 marks]

H H H H | | | | H ⎯ C = C ⎯ C ⎯ C⎯ H | | H H Compound P


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

Substance X + glycerol ⎯→ fats + substance Y

(c) Equation above shows the reaction involve in manufacture of fats. State substance X and substance Y.

Substance X : ___________________________________________________________ Substance Y : ___________________________________________________________ [2 marks]

(d) State the homologous series of fats. _____________________________________________________________________ [1 mark]

(e) Fats can be divided into saturated fats and unsaturated fats. (i) Name the process to convert unsaturated fats to the saturated fats. _____________________________________________________________________ (ii) State the catalyst used in this process. _____________________________________________________________________ [2 marks]

6. A student carried out two experiments to investigate the factor that affects the rate of reaction.

(a) (i) Write the chemical equation for this reaction. _____________________________________________________________________ [2 marks]

(ii) Calculate the maximum volume of hydrogen gas released at room condition in these experiments. [Molar volume of gas at room condition, 24 dm3mol-1] [2 marks] (b) Calculate the average rate of reaction for experiment 1 and experiment 2.

[2 marks] (c) The volume of gas released in experiment 1 is sketched in the diagram below.

Sketch the curve for experiment 2 in diagram above. [1 mark]

(d) Explain why the rate of reaction experiment 2 is higher than experiment 1 according the collision theory. _____________________________________________________________________ [3 marks]

Volume of gas/ cm3

Time / s


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

SECTION B[20 marks]

Answer any one question from this section

7. Diagram below shows the apparatus set up for the electrolysis of copper(II) sulphate solution using carbon and copper electrodes. After 30 minutes the changes was observed.

(a) Based on the diagram above, state the factor that determines the product formed at electrode X and Y. [2 marks] (b) Explain the reaction at electrode X and Y. Include the following in your explanation. •Listalltheionspresentintheelectrolyte •Listofionsattractedtoeachelectrode •Nameoftheionselectivelydischargeandionformedatelectrode. •Thereasonwhytheionsselectivedischargeatcathode •Halfequationforthereactionattheeachelectrode. [10 marks] (c) Copper electrode X is replaced by carbon electrode. (i) State the type the reaction at this electrode. Give a reason. (ii) Write the half equation for the reaction at this electrode. [4 marks] (d) Diagram below shows the simple voltaic cell.

Electron flows from metal Q to metal P. Identify the negative terminal and positive terminal in this simple voltaic. State the observation in each terminal. [4 marks] 8. (a) (i) By state an example of reaction between acid and metal, explain the redox reaction in terms of change in oxidation number. [4 marks] (ii) By state an example, explain why double decomposition reaction not a redox reaction? [3 marks]

(b) Reaction between copper(II) sulphate solution and zinc metal also is an example of redox reaction. (i) Name and write the half equation of this reaction to show oxidation and reduction process. [5 marks] (ii) State two observations that you can observe. Explain why. [4 marks] (iii) Copper(II) sulphate solution is replaced by the iron(III) chloride solution. State two observations and determine the oxidizing and reducing agent. [4 marks]

Copper (II)


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

SECTION C[20 marks]

Answer any one question from this section

9. (a) Salt is very important in our daily life. (i) State what is salt? [2 marks] (ii) Zinc nitrate is an example of soluble salt. State four reactions how to prepare zinc nitrate and write chemical equation for the each reaction. [8 marks] (b) A student wants to prepare 100 cm3 solution of sodium hydroxide 0.2 mol dm-3. [Relative Atomic Mass: Na, 23 ; O, 16 ; H, 1]

(i) Calculate the mass of sodium hydroxide necessary to prepare this solution. [3 marks]

(ii) Explain how we want to prepare 100 cm3 sodium hydroxide solution 0.1 mol dm3 from the solution in (b)(i) through dilution process. [7 marks]

10. (a) Ethene is an example hydrocarbon compound. (i) What is meant by hydrocarbon and state the hologous series of ethene. [2 marks] (ii) Ethene is bubble through bromine water. What is observation and state the type of reaction that occurred. Give the name and draw the structure formula of the product. [4 marks] (b) A hydrocarbon Z contains 82.75% of carbon by mass. [Relative Molecular Mass : C, 12 ; H,1]

(i) Calculate the empirical formula of Z. [4 marks] (ii) Determine the molecular formula of Z if its Relative Molecular Mass is 58. [3 marks] (iii) Draw and name the all of isomers of compound Z. [4 marks] (c) Explain why vulcanised rubber more elastic than natural rubber. [3 marks]


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y


Answer all questions

1 Diagram 1.1 shows the set-up of apparatus used in an experiment to determine the position of different metals in the electrochemical series by measuring the voltage of different pairs of metals.

The experiment is repeated by replacing metal M with metals N, P and Q and salt solution of M with the respective salt solutions of N, P and Q. The copper electrode is the positive terminal in all the experiments.

Diagram 1.1



WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

Diagram 1.2 shows the voltmeter readings of all the experiments.

(a) Record the voltmeter readings in the spaces provided in Diagram 1.2. [3 marks]

(b) Construct a table to record the voltmeter reading for the different pairs of metals.

[3 marks] (c) State one hypothesis based on this experiment. ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ [3 marks]

(d) State the observations that can be made for this experiment after 20 minutes at: (i) The negative terminal _____________________________ _________________________________________ (ii) The positive terminal _____________________________ _________________________________________ (iii) The copper(II) sulphate solution __________________________ ____________________________________________ [3 marks]

Diagram 1.2


JAW

APA

N b

ole

h d

ida

pa

ti di la

ma

n w

eb

ww

w.a

ftersc

ho

ol.m

y

(e) Explain your answer for (d) (iii). _____________________________________________________________________ _____________________________________________________________________ [3 marks]

(f ) State the operational definition for the position of metals in the electrochemical series. _____________________________________________________________________ _____________________________________________________________________ [3 marks]

(g) For this experiment, state: (i) The manipulated variable ______________________________________________________________________ (ii) The responding variable ______________________________________________________________________ (iii) The constant variable ______________________________________________________________________ [3 marks] (h) Based on the voltmeter readings, arrange all the metals in ascending order of their electropositivity. ______________________________________________________________________ [3 marks] (i) The experiment is repeated by using different pairs of metals as shown in Table 1. Predict the positive terminal and

the voltage for each pair of metals by completing the table.

[6 marks]

Table 1

(j) The following is a list of chemical substances: •Sodiumchloride •Silverchloride •Zincsulphate •Lead(II)sulphate Classify these substances into substances that can be made as an electrolyte and substances that cannot be made as an

electrolyte.

[3 marks]


WA

PAN

bo

leh

did

ap

ati d

i lam

an

we

b w

ww

.afte

rsch

oo

l.my

2 Diagram 2.1 shows two methods of dissolving sugar cubes to make sugar solution.

Diagram 2.1

A group of students discovered that it is faster to dissolve the sugar cubes to make sugar solution by using hot water rather than cold water. This is due to the difference in the temperature of the water.

Referring to the situation above, plan a laboratory experiment to investigate the effect of temperature on the rate of reaction between sulphuric acid and sodium thiosulphate solution.

Your planning should include the following aspects.

a) Statement of the problem

b) All the variables

c) Statement of the hypothesis

d) Lists of substances and apparatus

e) Procedure

f ) Tabulation of data

[17 marks]

END OF QUESTION PAPER

SOALAN ULANGKAJI SPM 2012

ChemistryJawapan

Chemistry Paper 1



Chemistry Paper 2http://cikguadura.wordpress.com/







Chemistry Paper 3http://cikguadura.wordpress.com/






Documents

Analysis [4541/1] [4541/2] Chemistry [4541/3] http ......SOALAN ULANGKAJI SPM 2012 109 JAWAPAN boleh didapati di laman web Chemistry Paper 1 [4541/1]1. Diagram 1 shows the electron