SEKTOR PENGURUSAN AKADEMIKPEJABAT PENDIDIKAN DAERAH PETALING PERDANA

SEKTOR PENGURUSAN AKADEMIKPEJABAT PENDIDIKAN DAERAH PETALING PERDANA

PEPERIKSAAN PERCUBAANSIJIL TINGGI PERSEKOLAHAN MALAYSIA

(MALAYSIA HIGHER SCHOOL CERTIFICATE)

Instructions to candidates:

DO NOT OPEN THIS QUESTION PAPER UNTUL YOU ARE TOLD TO DO SO.

There are fifty questions in this paper. For each question, four suggested answers are given. Choose one correct answer and indicate it on the multiple-choice answer sheet provided.

Read the instructions on the multiple-choice answer sheet carefully.

Answer all questions. Marks will not be deducted for wrong answers.

Arahan kepada calon:

JANGAN BUKA KERTAS SOALAN INI SEHINGGA ANDA DIBENARKAN BERBUAT DEMIKIAN

Ada lima puluh soalan dalam kertas ini. Bagi setiap soalan, empat cadangan jawapan diberikan. Pilih satu jawapan yang betul dan tandakan jawapan itu pada helaian jawapan aneka pilihan yang dibekalkan.

Baca arahan pada helaian jawapan aneka pilihan itu dengan teliti.

Jawab semua soalan. Markah tidak akan ditolak bagi jawapan yang salah.

This question paper consists of 11 printed pages.(Kertas soalan ini terdiri daripada 11 halaman bercetak)

© Pejabat Pendidikan Daerah Petaling Perdana 2011

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CHEMISTRY (KIMIA)PAPER 1 (KERTAS 1)

MULTIPLE-CHOICE (ANIKA PILIHAN)One hour and forty-five minutes

(Satu jam empat puluh lima minit)

CONFIDENTIAL/SULIT

Section A

Four suggested answers labelled A, B, C and D are given for each question. Choose one correct answer.

1. A typical solid fertiliser for use with household plants and shrubs contains the elements N, P, and K in the ratio of 15 g : 30 g : 15 g per 100 g of fertiliser. The recommended usage of fertiliser is 14 g of fertiliser per 5 dm3 of water.What is the concentration of nitrogen atoms in this solution?[Relative atomic masses of N, P and K are 14.0, 31.0 and 39.1 respectively]

A 0.030 mol dm–3

B 0.050 mol dm–3

C 0.42 mol dm–3

D 0.75 mol dm–3

2. Which expression gives the pressure exerted by 1.6 x 10–3 mol of N2 in a container of volume 3.0 dm3 at 273 oC ?

A

B

C

D

3. Which of the following statements explains why the emission spectrum of the hydrogen atom

consists of discrete lines?

A The electron of the hydrogen atom exists in an unstable excited state.B The electron in hydrogen atom can only occupy certain energy levels.C Radiation is emitted when electronic transitions from higher energy levels to lower energy

levels occurred.D The emission spectrum consists of discrete lines with certain frequencies.

4. Which of the following electronic configurations represents the lowest energy excited state of an atom? 1s 2s 2p

A

B

C

D

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5. Which of the following electronic configurations represents an atom that has the highest second ionization energy?

A 1s2 2s2 2p3

B 1s2 2s2 2p4

C 1s2 2s2 2p5

D 1s2 2s2 2p6 3s1

6. The sequence of ionization energies (kJ mol─1) of an element are shown below.

762(first), 1540, 3300, 4390, 8950, 1190

In which group of the Periodic Table does this element likely to exist?

A Group 1 B Group 2 C Group 13 D Group 14

7. Compounds X and Y have the following properties.(i) Both are covalent.(ii) Both have the same type of intermolecular forces.(iii) Compound X has higher boiling point than Y.X and Y could be

X YA HF HCl

B HF NH3

C HCl HI

D HBr NH3

8. Which of the following compounds is held by van der Waals forces only?

A WaterB Phenol C Tetrachloromethane D Magnesium chloride

9. Consider the reaction below:

Which of the following is true when the temperature is increased?

k1 k-1

A Increase Decrease B Decrease Decrease C Increase Increase D Decrease Increase

10. Which of the following are the units for the rate constant for a zero order reaction?

A s-1

B mol dm-3 s-1

C mol-1 dm3 s-1

D no units

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11. Which of the following defines a reversible reaction?

A At all times the reaction is continuous B The forward reaction and backward reaction is not the sameC The forward reaction uses reactants and backward reaction uses productsD There is always a significant amount of reactant and product at any instant

12. Which of the following is true of the reaction between boron trifluoride and ammonia?

A Ammonia is a Lewis baseB The product is a conjugate baseC The reaction is an acid-base reaction because it involves proton transferD The product is formed from electron pair transfer

13. A saturated solution of lead (II) chloride contains 1.4 x 10-4 mol dm-3 of lead (II) ions. What is its solubility product, Ksp (in mol3 dm-9) at that temperature?

A 2.74 x 10-2 B 1.10 x 10-11 C 1.96 x 10-8 D 3.92 x 10-8

14. Which of the following is best characterised by an ideal mixture formed between liquid A and B?

A The enthalpy of A and B is higher than the enthalpy of the mixture A-BB The enthalpy of A and B is lower than the enthalpy of the mixture A-BC The type of the intermolecular forces in A and B is of the same nature but very different

strength D The potential energies of the particles in pure A and B and the potential energy in the mixture

are the same

15. Below are the standard electrode potentials, EӨ, for several copper and ferum species. Electrode system EӨ / V Cu2+(aq) / Cu+ (aq) + 0.15

Cu2+(aq) / Cu (s) + 0.34

Cu+ (aq) / Cu (s) + 0.52

Fe2+ (aq) / Fe (s) − 0.44

Fe3+ (aq) / Fe (s) − 0.04

Fe3+ (aq) / Fe2+ (aq) + 0.77

Based on the above information, which of the following is correct? A Cu is the strongest reducing agent. B Fe3+ is the strongest oxidising agent. C Cu2+ is able to oxidise Fe2+ to Fe3+

D The electromotive force for the cell Fe(s) / Fe2+(aq) ׀׀ Cu+(aq) / Cu (s) is 0.08 V

16. During the electrolysis of brine in a mercury cathode cell or a diaphragm cell, chlorine, hydrogen and

sodium are produced. Which of the following provides the mole ratio of these products?

Chlorine Hydrogen Sodium Hydroxide A 1 1 1 B 1 1 2

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C 1 2 2 D 2 1 117. For which equation does the enthalpy change correspond to the enthalpy change of atomisation of

iodine?

A ½ I2 (s) → I (s)

B ½ I2 (s) → I (g)

C I2 (g) → 2I (g)

D I2 (s) → 2I (g)

18. Iodine trichloride, ICl3, is made by reacting iodine with chlorine.

I2(s) + Cl2(g) → 2ICl(s) ; ΔHӨ = +14 kJ mol–1

ICl(s) + Cl2(g) → ICl3(s) ; ΔHӨ = – 88 kJ mol–1

By using the data above, what is the enthalpy change of the formation for solid iodine trichloride?

A –60 kJ mol–1 B –74 kJ mol–1 C –81 kJ mol–1 D –162 kJ mol–1

19. The table shows the enthalpy change of neutralisation per mole of water formed, ΔHneu , for various acids and bases.

Acid Base ΔHneu (kJ mol-1)Hydrochloric acid Sodium hydroxide − 57.0

P Sodium hydroxide − 54.0Hydrochloric acid Q − 52.0

Nitric acid R − 57.0

What are P, Q and R?

P Q RABCD

Ethanoic acidEthanoic acid Sulphuric acidSulphuric acid

AmmoniaSodium hydroxideAmmonia Sodium hydroxide

Potassium hydroxideAmmoniaPotassium hydroxideAmmonia

20. The graph shows how a property of the elements Na to Ar varies with proton number.

What is the property?

A atomic radiusB melting pointC first ionisation energyD electronegativity

21. Which properties of the Group 2 elements (magnesium to barium) and their compounds increase with increasing proton number?

A The stability of the carbonate to heatB The solubility of the sulphate in water

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C The polarising power of the cation D The first ionisation of the elements

22. An aqueous solution of aluminium chloride has a pH less than 7 because

A H3O+ ions are eliminated from waterB aluminium ions undergo hydrolysisC aluminium ions have a high charge densityD aluminium chloride forms dimer

23. Which of the following statements is true about the oxides of Group 14 elements (carbon to lead) in the Periodic Table?

A All the oxides are covalent compounds.B The general formulae of the oxides are MO and MO2.C The oxides of silicon and germanium have amphoteric characteristics.D The oxides with the +4 oxidation state are more stable than those with the +2 oxidation state.

24. Carbon fibre is one of the components of a composite substance which is used to make bullet-proof jackets. Which of the following is not a property of carbon fibre?

A ElasticB Low densityC Stable at high temperaturesD Inert towards chemical substances

25. Oxides of nitrogen are air-polluting substances which are released from exhausts of vehicles. These substances

A cause cancerB deplete the ozone layerC decompose to toxic substancesD cause photochemical smog

26. The solution produced when chlorine gas is passed through dilute sodium hydroxide solution can be used as

A a weed-killerB a bleaching agentC a water cleanerD an agent for extracting bromine

27. Which of the following best explains the homogeneous catalysis of transition elements?

A Has various oxidation statesB Lowers the enthalpy change of reactionC Provides energy to increase the number of effective collisionsD Provides electrons so that adsorption occurs by formation of temporary bonds

28. Which of the following organic compounds does not exhibit stereoisomerism?

A CH3CH2CH2CH = CH2

B CH3CH = CHCH3

C BrCH = CBrCH3

D CH3CHBrCl

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29. Which of the following sets of organic compounds is arranged correctly in the order of decreasing acidic strength?

A C6H5OH > CH2ClCOOH > CH3COOH > C2H5OH

B C6H5OH > C2H5OH > CH3COOH > CH2ClCOOH

C C2H5OH > C6H5OH > CH3COOH > CH2ClCOOH

D CH2ClCOOH > CH3COOH > C6H5OH > C2H5OH

30. Which reaction shows the propagation step during the reaction between methane and chlorine in the presence of light?

A H• + Cl2 → HCl + Cl•

B CH4 + Cl+ → CH3Cl + H+

C CH4 + Cl+ → CH3+ +HCl

D CH4 + Cl• → •CH3 + HCl

31. What organic product is formed when ethene reacts with bromine water?

A BrCH2CH2Br

B HOCH2CH2Br

C BrCH2CH2Br and HOCH2CH2Br

D BrCH2CH3 and HOCH2CH3

32. CH3Br CH3CN CH3COOH

What are the appropriate reagents to change bromomethane to ethanoic acid?

I II

A Aqueous NaCN EthanolB Aqueous HCN Dilute nitric acidC Ethanolic KCN Dilute sulphuric acidD Ethanolic NaCN Grignard reagent

33. When a halogen compound S is boiled under reflux conditions with silver nitrate in ethanol, no precipitate is formed. Which of the following compounds is most likely compound S?

A

B CH3CH2CHClCH2CH3

C CH3CH2CH2COCl

D CH3CH2CH2NH3+Cl-

34. Which of the following is the main product when 2-methylbutan-2-ol undergoes dehydration?

A 2-methylbut-1-eneB 2-methylbut-2-eneC 2,2-dimethylpropeneD propanone

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I II

CH3

Cl

CONFIDENTIAL/SULIT

35. What is the product formed when phenylmethanol, , reacts with ethanoyl chloride,

A

B

C

D

36. Which of the following reaction sequences contains two compounds which both give a yellow precipitate on warming with a mixture of iodine and aqueous sodium hydroxide?

A CH3CH2Cl → CH3CH2OH → CH3COOH

B CH3CH2Cl → CH3CH2OH → CH3CH2OCH2CH3

C CH3CH2OH → CH3CHO → CH3COOH

D CH3CH2OH → CH3COOH → CH3COCl

37. A compound B liberates carbon dioxide from aqueous sodium hydrogencarbonate. B reacts with neutral iron(III) chloride solution to give a purple colouration. What is compound B?A

B

C HOCH2COOH

D CH3COONa

38. Which of the following is the product formed when propanamide is treated with lithium tetrahydridoaluminate(III) in dry ethoxyethane?

A CH3NH2

B (CH3CH2)2NH

C CH3CH2CH2NH2

D (CH3)3N

39. An ester, J, with a fruity smell has the following structural formula.

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– CH2OH

O || CH3 – C – Cl ?

CH2Cl

– CH2 – C – Cl

O ll

CH2 – O – C – CH3

O ll

– C – CH3

O ll

COOHOH

OH

O || CH3 (CH2)6 – C – O – CH(CH3)2

Ester J

CONFIDENTIAL/SULIT

What are the compounds produced when J is hydrolysed using hydrochloric acid?

A CH3 (CH2)6CHO and (CH3)2CHOH

B CH3 (CH2)6COOH and (CH3)2CHCl

C CH3 (CH2)6COCl and (CH3)2CHOH

D CH3 (CH2)6COOH and (CH3)2CHOH

40. Which of the following is obtained when phenylamine C6H5NH2 dissolved in concentrated hydrochloric acid is reacted with sodium nitrite solution at 5 oC?

Section B

For each question in this section, one or more of the three numbered statements 1 to 3 may be correct. The responses A to D should be selected as follows.

A B C D

1 onlyis correct

1 and 2 onlyare correct

2 and 3 onlyare correct

1, 2 and 3are correct

41. Which of the following explains the characteristics of graphite accurately?

1 Graphite can be used as a lubricant.

2 The distance between the carbon atoms in the hexagonal plane is smaller than that between the planes.

3 Graphite is an electric conductor along the hexagonal planes but is not an electric conductor in a plane vertical to the hexagonal planes.

42. Which of the following statements about elements in the Periodic Table is true?

1 Electronegativity increases when moving down a group.

2 Ionization energy increases across a period.

3 Polarizing power of cations increases across a period.

43. Which of the following species and its shape is/are correct?

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NO2

–OH N = N––

OH

–N+ ≡ N Cl–

CONFIDENTIAL/SULIT

Species Shape

1 PCl4+ tetrahedral

2 CH3− trigonal pyramidal

3 H3O+ trigonal planar

44. Which of the following is a true characteristic of the mixture of composition x shown in the graph below?

1 It is an azeotropic mixture

2 It boils at constant temperature

3 Its vapour composition is identical to the composition of the distillate

45. Pain is often felt when a piece of aluminium foil touches a dental amalgam filling in a tooth because an electric current momentarily flows. The amalgam contains tin, Sn. The standard electrode potentials are as follows:

Al3+ + 3e → Al EӨ = − 1.66 V Sn2+ + 2 e → Sn EӨ = − 0.13 V

1 Electrons flow from the aluminium foil

2 Sn2+ ion are discharged into the saliva of the mouth

3 The standard cell potential is 1.79 V

46. Which statements about the manufacture of aluminium by electrolysis are correct?

1 The high electric current is used to provide enough heat to maintain the temperature at around 950 oC

2 Cryolite is used so that the melting point of the electrolyte becomes lower

3 Aluminium, being less dense than the molten electrolyte, floats on top of the cell

47. Refer to the equation of the Haber process given below:

N2(g) + 3H2(g) 2NH3(g) ΔH = negative

The yield of ammonia can be increased by

1 using a catalyst

2 increasing the pressure

3 decreasing the temperature

48. Which substance(s) can be used to convert carboxylic acids to acyl chlorides?

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1 Phosphorus pentachloride

2 Chlorine

3 Hydrogen chloride

49. Dopamine is a drug used in the treatment of Parkinson’s disease.

Which of the following statements about this compound are correct?

1 It can exist in optically active forms

2 1 mole of dopamine will react with 3 moles of sodium hydroxide to form a salt

3 It can exist as a Zwitterion in aqueous solution

50. Which of the following groups of polymers can be recycled?

1 Ziegler-Natta catalysed polymer

2 Thermoplastic polymer

3 Thermosetting polymer

*This question paper is CONFIDENTIAL until the examination is over.

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HO–

– CH2CHCOOH

OH

NH2

׀