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INSTITUT KIMIA MALAYSIA

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KUIZ KIMIA KEBANGSAAN MALAYSIA (KsM) 2011,

Peringkat Lanjutan

Tingkatan 6 dan Matrikulasi

Tarikhz 2l fulai, 20ll (Khamis)Masa: L0.00 pagi - 11,.20 pagi

Arahan:1,. Anda dilarang membuka kertas soalan ini sehingga diarahkan oleh guru pengawas

anda.2. Kertas soalan ini mengandungi 13 muka surat.3. Kertas soalan ini mengandungi 40 soalan, soalan t hingga 40 adalah dalam Bahasa

Inggeris. Anda dikehendaki menjawab semua soalan dalam jangka masa 1. jam20minit. 10 minit tambahan diberikan untuk mengisi dan menghitamkan nama

peserta, nombor kad pengenalan peserta, kod sekolah, nama sekolah, alamatsekolah, tingkatan dan poskod.

4. Semua jawapan hendaklah ditanda dalam Borang ]awapan OMR yang dibekalkandengan menggunakan pensel 28.

5. Penggunaan kalkulator yang tidak boleh diprogramkan adalah dibenarkan.

@ Institut Kmia Malaysia,IY'.NITiada sebarang bahagian daripada kertas soalan ini boleh dicetak semula tanpa kebenarandaripada IKM.

Kum Krnar* KsseNc$AAN Melevslt (KsM) 20ll

Arahan mengisi Borang Tawapan OMR:

Anda diminta mematuhi peraturan berikut semasa mengisi Borang Jawapan

OMR.

1,. Jangan lipat Borang Jawapan OMR.

2. Hitamkan sepenuhnya seperti (O) dengan menggunakan pensel 2B

3. Jika ada kesiiapan, padamkan kesilapan yang berkenaan sepenuhnya.

4. Tuliskan nama anda, nama sekolah dan alamat sekolah anda dalam ruang

yang berkenaan dengan menggunakan huruf besar.

5. Tuliskan nama, nombor kad pengenalan, poskod dan kod sekolah anda

serta hitamkan huruf atau angka yang berkenaan dalam ruang yang

disediakan.

Hitamkan ruang'jantina','bangsa' dan'tingkatan' seperti O.Sekiranya kod sekolah tidak diisi dengan betul seperti dalam arahan,

penyertaan tersebut akan dibatalkan.

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1. Figure 1 shows the structural formula of l/-Methyl-D-aspartic acid, a drug used in thetreatment of stroke, trauma and epilepsy.

co2H

I

I

CH,

I

cH3NHCHCO2H

Figure 1

Which of the following statement is true?

A. It is optically active.B. It is an essential amino acid.C. It reacts with phenol to form an ester.D. One mole of ,V-Methyl-D-aspartic acid reacts with one mole of sodium hydrogen

carbonate to give one mole of carbon dioxide.

2. Which of the following compounds will give 1,4-benzenedioic acid when heated withdilute hydrochloric acid?

CHzOH

A. l"ICHs

ococ

6Y

ococ

B.

D.C. Hs

He

When an alkene X, C5Hrc, is reacted with hydrogen peroxide and zinc, followed byhydrolysis, the products are ethanal, CH3CHO, and butanone, CHTCHzCOCH:.

What is the structural formula of Xl

A. CH2:C(CH:)CHzCH:B. CH:CH:CHCH(CH3)2c. cH3cH2c(cH3):cHCH3D. CHsCH:CHCH2CH2CH3

In the following reaction, it is found that reducing the concentration of (CH3)3CBr byhalf causes the rate of reaction to be halved, but reducing the concentration of OH has

no effect on the rate.

(CH3)3CBr(aq) + OH:(aq) -+ (CH3)3COH(aq) +B{(aq)

What is the rate law?

A. Rate: fr[(CH:):CBr]B. Rate: k[(CH:):CBr] %

C. Rate: f[(CH3)3CBr1%;Of 1

D. Rate: k[(CH3)3CBr12;Olt 1

A compound G has the following properties:o Forms a yellow precipitate with alkaline iodineo Forms a white precipitate with sodium hydrogen sulphite

Which of the following is G?

A. CoHsCHzOHB. CoHs-CHzCOCH3C. C6H5-CH2COOCHgD. o-HOHzC-CoH+-CHzCl

In the following reaction, identifyX Y and Z?

CoHsXHzO SOCIz

-> CoHsY ---) CeHsZMg COz

-t ---+

XA. BrB. BrC. BrD. Cl

YCOOHCOOHCOOHCHO

ZCOClCH2ClcocH3CH2Cl

7.HCN H2, Ni

CH3CHO -+ P ---) O

In the above reaction, what rs Q?

A.B.C.D.

cH3cH(oH)NH2cH3cH2coNH2CH:CHZCH:NHcH3cH(oH)cH2NH2

The percentage by mass of oxygen in X i s 7 I .Io .

Xhas a minimum of one carbon atom in its molecule.When burnt, 10 cm3 of gaseous Xllberute 10 cm3 carbon dioxide gas.

I onlyI and II onlyII and III onlyI, II and III

8. which of the following molecules haslhave non-zero dipole moments?

H2C:CHCIczs-CIHC:CHCItrans-CIHC:CHCI

I onlyIII onlyI and II only[, II and III

An organic compound X, has an empirical formula CHO2. Which of the followingstatements is lare true?(Relative atomic mass: C,I2;H,I; O,16)

9.

IIIilI

A.B.C.D.

10. Below are pairs of isomers.difference in boiling point?

A. CHs

I

I

,, .,tC,""""OHH,/ \' cooH

Which of the following pairs of isomers has the biggest

CHg

I

.rL-Ho,""'/ \ t-tI

cooH

t\ ./H7.

-7'ttv Vr

cHz/ \"*,

C.

D.

'H. t"\

,CHZ,z

c:crCHs/ \ g

HH;lttttlH-C

-OHlllHHH

HOHlillH_c _c C_Htt

HH

HHttc_ c_HltOH FI

HOlllc-c-oHI

A

H

I

H_cI

H

H

I

H_cI

H

11. A sample of 4-ethyltoluene is heated with an excess of alkaline potassium

manganate(Vll) solution. A white precipitate is obtained when a mineral acid is added

to the mixture.

What is the maximum mass of the white precipitate formed from 3.00 g of 4-

ethyltoluene?(Relative atomic mass: C,I2.0; H,1.0; O,16.0)

A. 3.05 gB. 3.75 gC. 4.15 gD. 4.50 g

12. When 0.7859 of ethanoyl chloride is dissolved in water, which of the following is true ofthis reaction?

(Relative atomic mass: C,l2;H,1,; O,16; C1,35.5)

A. Chlorine gas is released.B. Electrophilic substitution reaction takes place.C. The solution requires 0.02 mole of NaOH for complete.D. Its organic product is the same as the acidic hydrolysis of ethyl methanoate.

Which graph best describes the following reaction if it is first order in NzO+?

r'i2traf l) --rF

2t1[ 2{g}

tl'12[4] I H2n4l

tl,lZ04l t Nzn4l

13.

14. If 88.0 grams of solid carbon dioxide evaporates, how many liters of CO2 gas will beformed at a temperature of 300 K and2.00 atmospheres of pressure?(Gas law constant, R is 8.31 J mol-1K-1 )

A. 24.63 LB. 98.50 Lc. 1080 LD. 2I7OL

15. Ali and Ah Chong measured the mass of an object on two different electronic balances.The accepted mass of the object was 1.355 g. Ali obtained 1.531 g, 1.537 9,1.535 g and

1.533 g while Ah Chong obtained 1.350 g, 1.424 g,1.276 g and 1.370 g.

Which statement best describes the results obtained by Ali and Ah Chong?

A. Ali obtained a better accuracy.B. Ali obtained a better precision.C. Ah Chong obtained a better accuracy.D. Ah Chong obtained a better precision.

Silicon has 14 electrons. Which of the diagram below represents the electronicconfiguration of silicon at ground state?

TtftT-nntllTllTl-il

mm[T-l-rmmtlTTlTIt-ll

mm

17. Given that the vapour pressure of a liquid X is 173 mmHg and a liquid Y is I27mmHg,what would be the total vapour pressure over a 2:1 mol rutio of X and Z mixnxe?

A. 158 mmHgB. 180 mmHgC. 200 mmHgD. 300 mmHg

16.

A. .4. l---l-'l I

spllflTlr' [n

, rp tlTTl-l'fl1.l

:= [nt= [l

C. ,1- l---l-=l I

sp l-lTlls= [ntpllllffi:=ffit=ffi

B. Ar-J

2nJF'

aa- J5

/-lJ

anr-a

4nIJ

D. 3n-t-

4s

QnrJ,f,

.1*r.p

2s

1s

18. What would be the concentration of Ba(OH)z solution if it takes 42.00 ml of 4.0 M HCIto neutralise 31.50 ml of the base?

A. 2.55 MB. 2.67 Mc. 2.95 MD. 3.01 M

The reading on the flight information display of a commercial airline indicates that thetemperature outside the fuselage is -100oC. At this cruising altitude, the density of air is10-e that of the earth's atmosphere at STP (1 atm and 0"C). Assuming a uniformatmospheric composition, what is the pressure at this altitude? (1 atm :760 ton).

4.8 x 10'7torr5.8 x 10-7torr6.8 x 10-7torr7.8 x 1O-7torr

It is assumed that a single cosmic event will produce 1 atom of 36Ar. A meteorite wasanalysed to ascertain the number of cosmic events thathad occurred. It was found that foreach kg of the meteorite, the volumn of 36Ar was 0.200 mm3 under standard state at 25oC.

What would be the number of cosmic events that had occurred per kg of meteorite?(R: 8.31 J mol-lK-l ; Avogadro constant :6.02x 1023mol-1 , 1 atm: 101 kPa)

A. 4.9 x 1015 eventsB. 5.4 x 1015 eventsC. 5.9 x 1016 eventsD. 6.4 x 1016 events

What is the weight of oxygen that would be used up by the combustion of 5 g of H2S?(Relative atomic mass: H,l; 0,16; S,32)

. 2532A. -x-x-334 7

3532-X-X-234 7

19.

A.B.C.D.

20.

21.

B.

3532C. -x-x-1.34 1

D. 1^u^t23432

The enthalpy, LIf , of some reactions are given below:

2Fe(s) + Oz(d ---+ 2FeO(s) AIf: *544.0 kI

4Fe(s) + 3Oz(S) ---+ 2FezOt(s) LIf: -I64B.4kJ

FqOa(s) -- 3Fe(s) + 2Oz(d LIf: +1118.4 kJ

What is the heat of reaction of the following using the above data?

Feo(y' + FezO:(,9 ---+ FezO+(s)

A. -1074.0 kJB. *22.2k1c. +249.8kJD. +22t4.6k1

A covalent molecule XYo has the following propertieso polaro trigonal pyramidal in shapeo forms coordinate bond with boron trifluoride

which of the following statements regarding the XYn molecule is not true?

A. The XY" molecuie acts as a Lewis acid.B. The XY, molecule has a lone pair of electrons.C. The element X is more electronegative than element y.D. Atom X undergoes sp3 hybridisation when forming bonds with atom y.

Partition law states that when a solute distributes itself between two immiscible liquids, the ratioof its concentration in the liquids is a constant.

Which of the following would most likely obey partition law?

Ammonia in CCI+ and water.Iodine in CHCI: and water.Benzoic acid in benzene and water.Hydrogen chloride in methylbenzene and water.

A.B.C.D.

25. A andB are two immiscible liquids with boiling points of 183"C and 100oC respectively.Which of the following is true when a beaker containing 100 cmr of A and,100 cm3 of Bis heated as shown in the diagramT

A.B.C.D.

Figure 2

The mixture obeys Raoult's law.The liquid boils at temperature < 100oC.The volume of the mixture is > 200 cm3.The vapour pressure above the liquid is the sum of Po7 and pop.

26.

27.

The electronic configuration of titanium is 1s2 2s2 2p6 3s2 3p6 3& 4s2. Which of thefollowing compound is unlikely to exist?

A. TiOB. TiOzc. K:TiFoD. IgTiO4

A colourless solid compound exhibits the following properties:

o When heated strongly, it produces a colourless gas that ignites a glowing splinto When the resulting solid is shaken with carbon tetrachloride and aqueous chlorine,

the solution turns purple

Which of the following is the colourless solid?

A.B.C.D.

KIO3KBrO3NaNO:KMnO+

28. [(CH3CH2)2NH2]2CuC1a is a thermochromic compound. It is bright green in colour in thecold but changes colour to bright yellow when heated to 43 oC. Pick the correct structuralformulae of the species of this compound at lower temperature and at 43 oc.

A. Square planar [CuCla]2- and tetrahedral [CuCla]2-B. Octahedral[Cu(CH:CHzNH)zClq]2-andsquareplanarfCuCla]2-C. Linear lcuclz] and tetrahedral lCuClalz-D. [CuCla]2- and [CuCl3]-

What is the coordination number of the complex tetraamminedichloridocobalt(Ill)chloride, [CoQ.{H3)aCl2] Cl?

A.38.4c.5D.6

X, Y and Z ate three elements in a short period in the Periodic Table and the propertiesof their chlorides are listed in the following:

o Chloride ofXdissolves in water and gives off white fumeso Chloride of Idissolves in water and forms a solution of pH 6o chloride of Z easily dissolves in water without being hydrolysed

which sequence of elements is in the order of increasing proton number?

A. X,Y,ZB. Y,X,ZC. Z,Y,XD. Z,X,Y

CompoundXis an important raw material in agriculture. It can be oxidized to compoundIwhich is used in the manufacture of fertilizer Z. What are the probable compounds ofX, Y and Z?

29.

30.

31.

A.B.C.D.

X

NOzHNOzNH3Soz

Y

HNO:HNO:HNO3HzSO+

Z

NH+NO:Ca(NO3)2

KNO3KzSO+

10

32. Which of the following statements explain why the volatility of the Group 17 elements inthe Periodic Table decreases on descending the group?

33.

A.B.C.D.

A.B.C.D.

Solid iodine is less soluble in water but very soluble in potassium iodide solutionbecause

The enthalpy of atomization decreases.The melting point and the boiling point increase.The number of electrons in the molecule increases.The intermolecular force of attraction increases.

the potassium iodide molecule is polar.in potassium iodide solution, iodine forms 13- .

in potassium iodide solution, iodine forms IO3- .

iodine forms an activated complex with potassium iodide.

i'i i;

34. The graph in Figure 3 shows the first ionization energies of 6 consecutive elements inperiod 3 of the Periodic Table.

which of the points A,B,C,D in the graph is the first ionisation energy of the nextelement?

First ionisation energy

A.B.

C.

D.

Proton number

Figure 3

1.1,

35. The diagram below represents theelements, P, Q and R.

l'"*."**;lt. -.tr'lEffiI

valence band and conductionband of Period 3

l;**.*;;lI. It. . - .l

I.:'.:..I'.di:i l1..1..i...i.....1.. i...i...:1.i11...j11""""-"'"'"-".".1

EnergyEnergy Energy

Figure 4

Which of the following is the correct sequence for the three elements across Period 3?

A. P, Qand RB. Q, P and R.

C. Q, Rand PD. R, Pand Q

Carbon-l4 is a radioisotope with decay rate of 15.0 disintegrations per minute per gramof'carbon (dpdg carbon). Half-life of carbon-14 is 5730 years. Radioactive decay is afirst order reaction.

The remains of a fire found in a cave is believed to be very old. The analysis of a sampleof ashes from the fire gave a carbon-I| decay rate of 8.0 dpm/g.

What is the approximate age of the sample?

A. 2870 yearsB. 3060 yearsC. 5200 yearsD. 5820 years

In an aqueous solution of HF of concentration of 0.10 mol dm-3, the degree ofdissociation is 8%.

Which of the following is true of 1.0 mol dm-3solution of HF?

pH of the solution is 2.10.

The degree of dissociation is 16%.

The acid dissociation constant is 6.4x10 -amol dm-3.

It is a stronger acid than 0.10 mol dm-3solution of HF.

R0P

36.

37.

A.B.

C.

D.

t2

38. Sulphur dioxide reacts with oxygen to form sulphur trioxide in a reversible reaction as

follows:2SO2(g)+Oz(g) - 2SO:(g)

In a 2 dm3 vessel, the number of moles of sulphur dioxide, oxygen, and sulphur trioxide inan equilibrium mixture are a, b, and c respectively.

The expression for the equilibrium constant, IQ for the above reaction will be:

A.+4azb

2c. +-azb

B.

D.

c2

,"'b

2c2

7ra

39. Consider the following reaction mechanism:

Which of the following is a reactant in the overall reaction?

is one of the vitamin B complexes. It is also a weak acid with

M solution of CzHsNOz?

A.B.

C.

D.

CIHClccl3CHCl3

40. Nicotinic acid, C2H5NO2,

Ku: 1.40 x 10-5.

What is the pH of a 0.050

A.B.

C.

D.

2.50

2.80

3.08

3.s0

Step I Clz +2Cl

Step 2 CHC13+ Cl + HCI + CC13

Step 3 CCl3+ Cl + CClq

13