k1 soalan kimia stpm 2011 trial sabah

8/4/2019 k1 Soalan Kimia Stpm 2011 Trial Sabah

1/13

CONFIDENTIAL*/SULIT*JABATANPELAJARANSABAHJABATANPELAJARANSABAHJABATANPELAJARANSABAH

JABATANPELAJARANSABAHJABATANPELAJARANSABAHJABATANPELAJARANSABAH


















JABATAN PELAJARAN SABAH

EXCEL 2 2011

Instructions to candidates:

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

There arefiftyquestions in this paper. For each question, four suggested answers

are given. Choose one correct answer and indicate it on the multiple-choice answersheet provided.

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

Answerallquestions. Marks will not be deducted for wrong answers.

Arahan kepada calon:

JANGAN BUKA KERTAS SOALAN INI SEHINGGA ANDA DIBENARKANBERBUAT 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 helaianjawapan 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 13 printed pages.(Kertas soalan ini terdiri daripada 13 halaman bercetak.)

962/1 CONFIDENTIAL*SULIT*

962/1 EXCEL 2

CHEMISTRY KIMIA

PAPER 1 (KERTAS 1)

MULTIPLE-CHOICE (ANEKA PILIHAN)

One hour and forty-five minutes (Satu jam empat puluh lima minit)


2/13

2

Section A

Four suggested answers labeled A, B, C, andD are given for each question. Chooseone correct answer.

1. Mass spectrometers separate isotopes of different elements based on their

A massB electric chargeC mass divided by electric chargeD abundance

2. The electronegative of five elements are given below :

Element P Q R S TElectronegative 0.7 1.1 1.6 2.6 1.7

Which of the following bonds has the lowest ionic character?A PSB Q

T

C PQD RT

3. The modern periodic table is given byA MendeleevB EinsteinC BohrD Moseley

4. The transition of an electron from a 4sorbital to 1sorbital in hydrogen atom causesA a Balmer lineB a Lyman lineC increases in kinetic energy of electronD conversion of H+ to H atom

5. A 5.82 g of silver coin is dissolved in nitric acid when sodium chloride is added to thesolution. All the silver is percipitated as AgCl. Percipitate weighs 7.20 g. What isthe percentage of silver in the coin?A 98.2%B 93.1%C 86.4%D 82.3%

6. An element X has the outer ground state electronic configuration ns2 np5. Whichstatement about X is incorrect?A Compared to other elements in its period, X has a relatively low first ionisation

energy.B X forms an X1 ion.C X forms diatomic molecules.D X is in group 17.


3/13

3

7. The Pauli Exclusion Principle limits the number of electrons that can occupy anorbital toA 1B 2C 3D 4

8.

Which of the following best explains this phenomenon?A Heating the gas reduces its pressure.B Heating the gas decreases its density.C Heating the gas decreases its molecular motion.D Heating the gas reduces the frequency of the gas molecules collisions.

9. Which of the following is an example of nuclear fusion?A Hydrogen-1 and hydrogen-2 combine to form helium-3.

B Polonium-210 decays into lead-206 and an alpha particle.C Carbon-14 breaks down into a beta particle and nitrogen-14.D Uranium-235 and a neutron produce barium-141, krypton-92, and three

neutrons.

10. The state of hybridisation of sulphur in SO2 is same as that of sulphur inA SCl2B SO3C SO4

2D SF4

11. Which of the following statement is correct?

A Polarisation of an anion is maximum by high charged cation.B Small sized cation minimises the polarisation.C Small anion brings about a large degree of polarisation.D A small anion undergoes a high degree of polarisation.

12. A mixture of iron and steam is allowed to reach equilibrium at 800 K:

3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g)The equilibrium pressures for hydrogen and steam are 3.5 kPa and 2.4 kPa


4/13

4

respectively. The equilibrium constant, Kp, for the reaction isA 4.5B 1.45C 9.0D 6.0

13. Hydrogen and carbon dioxide react as represented by the equation:H2(g) + CO2(g) CO(g) + H2O(g)

When 4 mol of hydrogen and 0.9 mol of carbon dioxide were used for this reaction,0.1 mol of CO2 was found in the equilibrium mixture. Calculate Kc for theexperiment.A 0.2B 2.2C 0.8D 2.0

14. In the following reaction,

H2O(l) + NH3(g) NH4+(aq) + OH(aq)

water acts as aA Bronsted-Lowry acidB Bronsted-Lowry baseC conjugate acidD conjugate base

15. Iodine reacts with propanone in the presence of dilute acids as represented by the

following equation: I2 + CH3COCH3 HI + ICH2COCH3The graph of the concentration of iodine in the reaction mixture measured at regulartime intervals is given as follows

Based on the graph, which of the following statements is true of the reaction above?A The rate of reaction is inversely proportional to [I2].B The rate-determining step in the reaction mechanism is independent of I2.C The reaction is first order with respect to I2.D The half-life of the reaction is a constant.

16. The table below shows the result of an experiment for the reaction at 25 C.X(aq) + Y(aq) Z(aq)


5/13

5

What is the rate equation for the reaction?A Rate = k[X]3 [Y]2B Rate = k[X]3 [Y]C Rate = k[X]2 [Y]D Rate = k[X] [Y]

17. How many electrons are required to deposit 6.35g of copper at the cathode in theelectrolysis of aqueous copper (II) sulphate?

[Relative atomic mass of Cu = 63.5, L = Avogrado number]A 6.35LB L__

6.35

C L x 6.3563.5

D L x (2 x 6.35)63.5

18 The solubility of the Group 2 sulphates decrease with increasing proton number ofthe Group 2 elements becauseA. The lattice energy of the sulphates decreasesB. The second ionization energy of the sulphates decreasesC. The ionic character of the sulphates increasesD. The hydration energy of the cations decreases

19 The substance formed when excess aqueous sodium hydroxide is added to aqueousaluminum sulphate is

A. [Al(OH)3Cl3]B. [Al(H2O)2(OH)4]

-C. [Al(OH)6]

3-D. [Al(H2O)6]

3+

20 Which one of the following properties decreases on descending Group 14 of thePeriodic Table?A. The acidity of the oxidesB. The stability of the +2 oxidation stateC. The electric conductivity of the elementsD. The ionic character of the oxides

21 Which of the following best explain the decreasing thermal stability of the +4oxidation state on going down the Group 14 elements?A. The metallic property of the elements increasesB. The size of the atoms increasesC. The ionization energy increasesD. The screening effect increases


6/13

6

22 In which of the following compound stated below , nitrogen exhibits the highestoxidation state?A. NH3B. N2O5C. HNO2

D. N2H4

23. The structural formula of ethyl 2-methylpropanoate is

A

B

C

D

24. Refer to the following reaction sequence:

Which one of the following types of reaction is not involved in the above

3

3

2 3

H C C O C

CH

H

O

CH CH

3

3

2 3

H C C C

CH

H

O

O CH CH

2 2

32 3

H C CH C

CH

O

O CH CH

3

3 2

3

CH CH C

CH

HO

O C CH

NO

NHNHCOCH

NO

NO

COCH

CH CH

COCH

CH CH

CH(OH)CH

CH CH

2

23

2

2

3

2

3

2 2

3

Step 1

Step 5

Step 2

Step 4

Step 3


7/13

7

sequence?

A acylation

B oxidation

C reduction

D dehydration


Which one of the following types of reaction mechanism is not involved in theabove sequence?

A electrophilic addition

B electrophilic substitution

C additionelimination

D elimination

26. Hydrolysis of the ester, CH3COOCH

2CH

2CH

3, produces ethanoic acid. In an

experiment, 2.04 g of the ester was used and 0.90 g of ethanoic acid wasproduced. What is the percentage yield of ethanoic acid?

A 44

B 59

C 75

NO

NHNHCOCH

NO

NO

COCH

CH CH

COCH

CH CH

CH(OH)CH

CH CH

2

23

2

2

3

2

3

2 2

3

Step 1

Step 5

Step 2

Step 4

Step 3


8/13

8

D 90

27. An excess of methanol was mixed with 12 g of ethanoic acid and an acid catalyst.At equilibrium the mixture contained 8 g of methyl ethanoate. The percentage yield

of ester present wasA 11

B 20

C 54

D 67


Which one of the following would be the most appropriate to carry out Step2?

A H2/Ni

B Sn/HCl

C LiAlH4

D Fe/HCl

29. When gas X reacts with Y, a mixture of CH2BrCH2Br and CH2BrCH2OH areproduced. X and Y are probably

X YA ethene bromine waterB ethene sodium bromide solution

NO

NHNHCOCH

NO

NO

COCH

CH CH

COCH

CH CH

CH(OH)CH

CH CH

2

23

2

2

3

2

3

2 2

3

Step 1

Step 5

Step 2

Step 4

Step 3


9/13

9

C HBr (g) etheneD Br2 vapour ethene

30. Consider the following reaction:

X + CH3Cl Cl X

The benzene derivative reacts slower than benzene. X is most likely to be the

A Cl atom B SO3H group C CH3CH2 group D NO2group

31. The compound C3H7Br undergoes a series of reactions as show below.

KCN in ethanol H2/ PtC3H7Br X Y

Boil 150 C

What is the product Y?

A CH3CH2CH2CN B CH3CH2CH2NH2C CH3CH2CH2CH2 NH2 D CH3CH2CH2COOH

32. Which of the following does not occur when Freon-12 (CF2Cl2) molecules collidewith ozone molecules in the stratosphere?

A CF2Cl2 CFCl2 + F B CF2Cl2 CF2Cl + ClC Cl + O3 O2 + ClO D ClO + O Cl + O2

33. 22.5 cm3 of 0.4 moldm-3 bromine water is needed to react completely with anaqueous solution of phenol. The relative molecular mass of phenol is 94. What isthe mass of phenol in the given solution?

A 0.141 g *B 0.282 g C 0.564 g D 0.846 g

34. Phenylmethanol is shaken with excess deuterium oxide (D2O ). How manyhydrogen atoms per molecule of phenymethanol will be replaced by the deuteriumatom?

A 1 B 3 C 5 D 8

35. Ethanal differs from other aldehydes in its reaction with which of the followingreagents?

A Fehlings solutionB Alkaline iodine solutionC Acidified potassium dichromate(VI) solution


10/13

10

D Hydrogen in the presence of a nickel catalyst.

36. An organic compound. P has the formula shown below.

=O

Compound P

A is an aromatic compound.B can be reduced to a primary alcohol.C undergoes oxidation to form a carboxylic acid.D gives a yellow precipitate with 2,4-dinitrophenylhydrazine.

37. When compound X is oxidized with acidified potassium dichromate (VI), compoundY is formed. Both compound X and Y contains the same number of carbon atomsper molecule. When X reacts with Y under suitable conditions, a compound with a

sweet fruity smell is produced. X is most likely to be

A propanal B propanoic acid C propan-1-ol D butan-2-ol

38. Which reagent will react with both ethanol and phenol?

A Bromine waterB Sodium hydroxideC Ethanoyl chlorideD Acidified potassium manganate (VII) solution

39. A substance, amigdalin present in almond gives it a distinctive delicious flavourwhen hydrolysed to form compound X. Compound Y and Z will be produced bycontinuous hydrolysis of X. The reaction scheme is shown below.

C6H5 OHHydrolysis continuous hydrolysis

Amigdalin C Y+ Z

H CNCompound X

What could Y and Z be respectively?

A C6H5CH(OH)COOH and NH3B C6H5CH2OH and NH3C C6H5COOH and NH3D C6H5OH and CH3CN

40. Which of the following reagents is unsuitable to be used to differentiate the twocompounds?


11/13

11

O O

C6H5 C H and C6H5 - C CH3

A Iodoform testB Tollens reagent

C Fehlings solutionD Mass spectrometer

Section B

For each of the questions in this section one or more of the three numbered statements1 to3 may be correct. Decide whether each of the statements is or is not correct. TheresponsesA toD should be selected on the basis of the following.

A B C D1 only

is correct1 and 2

are correct2 and 3 onlyare correct.

1 , 2, and 3are correct.

41. Which of the following statements are correct?

1In crystalline solids, particles are held rigidly together by strong attractiveforces in a three dimensional orderly structure called the lattice structure

2 In amophous solids the particles are not arranged in an orderly fashion

3 All solids are denser than liquids

42. Which of the following species do not have a tetrahedral shape?

1 PH4+

2 ICl4

3 XeF4

43. Which of the following statements are true for hydrogen bonding?

1 It is cause for the high melting of water

2 It is responsible for ice being less dense than water

3 It is responsible for the high enthalpy of vaporisation of water


12/13

12

A B C D1 only

is correct1 and 2



44. The diagram below shows the vapour pressure-composition graph for the ideal

mixture of benzene and toluene at 20oC.

Which of the following statements is true of a mixture which contains 40 % ofbenzene at 20oC?

1 The partial vapour pressure of benzene is 4.0 kPa

2 The partial vapour pressure of toluene is 1.8 kPa

3 The partial vapour pressure of the mixture of benzene and toluene is 13 kPa

45. The e.m.f of the cell

depends on the

1 pressure of the hydrogen gas.

2 concentration of the H+ ions.

3 concentration of the Zn2+ ions

46. Which of the following statements about PbCl4 are correct?

1 Its molecule is tetrahedral in shape

2 It is a liquid at room temperature

3 It readily decomposes to Pb and Cl2 on heating

Pt(s) / H2(g) , H+(aq) // Zn

2+(aq) / Zn (s)


13/13

13

A B C D1 only

is correct1 and 2



47. In which of the following reactions does ammonia react as a base?

1 Formation of a blue precipitate when ammonia gas is bubbled throughaqueous copper(II) sulphate(VI)

2 Reaction of ammonia gas with excess chlorine to form nitrogen trichloride

3 Formation of a dark blue solution when excess aqueous ammonia is added tosolid copper(II)hyroxide

48. Malic acid , HOOCCH(OH)CH2COOH is found in apples. Which of the following istrue about malic acid?

1 It has one chiral centre

2 It has a secondary alcohol

3 It form esters with ethanoic acid or with ethanol

49. Ethyl butanoate is used as an artificial pineapple flavoring. Which of the followingpairs can be used to produce the ester?

1 CH3CH2CH2COOH and CH3CH2OH

2 CH3CH2CH2COCl and CH3CH2OH

3 CH3CH2COOH and CH3CH2CH2OH

50. Which of the following react with both phenylamine and aminocyclohexane?

1 Ethanoyl chloride2 Bromine water

3 Sodium hydroxide

k1 soalan kimia stpm 2011 trial sabah

Documents