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2213-6107 19 pages
M13/4/CHEMI/HPM/ENG/TZ1/XX
Thursday 16 May 2013 (afternoon)
CHEMISTRYHIGHER LEVELPAPER 1
INSTRUCTIONS TO CANDIDATES
• Do not open this examination paper until instructed to do so.• Answer all the questions.• For each question, choose the answer you consider to be the best and indicate your choice on
the answer sheet provided.• The periodic table is provided for reference on page 2 of this examination paper.• The maximum mark for this examination paper is [40 marks].
1 hour
© International Baccalaureate Organization 2013
22136107
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88 Ra
(226
)
56 Ba13
7.34
38 Sr87
.62
20 Ca
40.0
8
12 Mg
24.3
1
4 Be 9.012
‡†
89 ‡
Ac
(227
)
57 †
La13
8.91
39 Y88
.91
21 Sc 44.9
6
90 Th23
2.04
58 Ce
140.
12
72 Hf
178.
49
40 Zr 91.2
2
22 Ti47
.90
91 Pa23
1.04
59 Pr14
0.91
73 Ta18
0.95
41 Nb
92.9
1
23 V50
.94
92 U23
8.03
60 Nd
144.
24
74 W18
3.85
42 Mo
95.9
4
24 Cr
52.0
0
55 Cs
132.
91
37 Rb
85.4
7
19 K39
.10
11 Na
22.9
9
3 Li 6.941 H 1.011 Fr87 (223
)
Ato
mic
num
ber
Elem
ent
Rela
tive
atom
ic m
ass
93 Np
(237
)
61 Pm14
6.92
75 Re
186.
21
43 Tc 98.9
1
25 Mn
54.9
4
94 Pu (242
)
62 Sm15
0.35
76 Os
190.
21
44 Ru
101.
07
26 Fe 55.8
5
95 Am
(243
)
63 Eu15
1.96
77 Ir19
2.22
45 Rh
102.
91
27 Co
58.9
3
96 Cm
(247
)
64 Gd
157.
25
78 Pt19
5.09
46 Pd10
6.42
28 Ni
58.7
1
97 Bk (247
)
65 Tb15
8.92
79 Au
196.
97
47 Ag
107.
87
29 Cu
63.5
5
The
Peri
odic
Tab
le
98 Cf
(251
)
66 Dy
162.
50
80 Hg
200.
59
48 Cd
112.
40
30 Zn 65.3
7
99 Es (254
)
67 Ho
164.
93
81 Tl20
4.37
49 In11
4.82
31 Ga
69.7
2
13 Al
26.9
8
5 B10
.81
3
100
Fm (257
)
68 Er16
7.26
82 Pb20
7.19
50 Sn11
8.69
32 Ge
72.5
9
14 Si28
.09
6 C12
.01
4
101
Md
(258
)
69 Tm16
8.93
83 Bi20
8.98
51 Sb12
1.75
33 As
74.9
2
15 P30
.97
7 N14
.01
5
102
No
(259
)
70 Yb
173.
04
84 Po (210
)
52 Te12
7.60
34 Se78
.96
16 S32
.06
8 O16
.00
6
103
Lr (260
)
71 Lu17
4.97
85 At
(210
)
53 I12
6.90
35 Br 79.9
0
17 Cl
35.4
5
9 F19
.00
7
86 Rn
(222
)
54 Xe
131.
30
36 Kr
83.8
0
18 Ar
39.9
5
10 Ne
20.1
8
2 He
4.000
2213-6107
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1. Whatisthewholenumberratioofthecoefficientsofammoniatooxygenwhenthefollowingequationisbalancedcorrectly?
3 2 2___ NH (g) ___O (g) ___ NO(g) ___ H O(l)+ → +
A. 1:2
B. 2:1
C. 4:5
D. 5:4
2. When50cm3ofahydrocarbon,CxHy,wasburnedinexcessoxygen,200cm3ofcarbondioxideand
250cm3ofsteamwereproduced(allvolumesweremeasuredunderthesameconditions).Whatisthemolecularformulaofthehydrocarbon?
A. C2H4
B. C3H8
C. C4H8
D. C4H10
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3. Whichgraph represents the relationshipbetweenvolumeandpressure for afixedmassof gas atconstanttemperature?
A. B.
V V
P P
C. D.
V V
P 1P
4. Whichdiagramshowsapatternsimilartotheemissionspectrumofhydrogen?
Increasingwavelength
A.
B.
C.
D.
2213-6107
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5. WhatisthecorrectelectronconfigurationoftheCu+ion?
A. [Ar]3d94s1
B. [Ar]3d74s2
C. [Ar]3d10
D. [Ar]3d84s1
6. Whichstatementconcerningelectronegativityiscorrect?
A. Electronegativityincreasesfromlefttorightacrossaperiod.
B. Metalsgenerallyhavehigherelectronegativityvaluesthannon-metals.
C. Electronegativityincreasesondescendingagroup.
D. Noblegaseshavethehighestelectronegativityvalues.
7. Whichstatementsarecorrect?
I. Fluorinewillreactwithpotassiumchloridesolutiontoproducechlorine.
II. Iodinewillreactwithsodiumchloridesolutiontoproducechlorine.
III. Brominewillreactwithlithiumiodidesolutiontoproduceiodine.
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
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8. Eachofthefollowingoxidesisaddedtoseparateequalvolumesofdistilledwater. Whichofthefollowingisthemostacidicoxide?
A. P4O10
B. SO3
C. Cl2O7
D. SiO2
9. Whatarethecorrectformulasofthefollowingions?
Nitrate Sulfate Phosphate Hydrogencarbonate
A. NO3– SO4
2– PO43– HCO3
–
B. NO3– SO4
2– PO33– HCO3
2–
C. NO2– SO4
– PO43– HCO3
–
D. NO2– SO3
2– PO33– HCO3
2–
10. Whichcompoundispredominantlycovalent?
A. LiCl
B. Al2O3
C. ClF
D. ZnCl2
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11. Whichcombinationbestdescribesthetypeofbondingpresentandthemeltingpointofsiliconandsilicondioxide?
Silicon Silicon dioxide
A. covalentbonding highmeltingpoint covalentbonding highmeltingpoint
B. metallicbonding highmeltingpoint covalentbonding lowmeltingpoint
C. ionicbonding highmeltingpoint ionicbonding lowmeltingpoint
D. covalentbonding lowmeltingpoint ionicbonding highmeltingpoint
12. Whichspecieshasasquareplanarshape?
A. B.
C
F
F
FF S
F
F
FF
C. D.
B
F
F
FF
– –
Cl
F
F
FF
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13. Whatarethehybridizationsoftheatomslabelled1,2and3inthemoleculebelow?
H3C C
O
O H1 2 3
1 2 3
A. sp2 sp2 sp
B. sp3 sp2 sp3
C. sp2 sp sp3
D. sp3 sp2 sp
14. Whichstatementiscorrectfortheenthalpyleveldiagramshown?
Enthalpy
Time
A. Thereactionisexothermicandtheproductsaremorestablethanthereactants.
B. Thereactionisexothermicandthesignoftheenthalpychangeispositive.
C. Thereactionisendothermicandthesignoftheenthalpychangeisnegative.
D. Thereactionisendothermicandtheproductsaremorestablethanthereactants.
Enthalpyofreactants
Enthalpyofproducts
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15. Whichprocessisendothermic?
A. 4 10 2 2 22C H (g) 13O (g) 8CO (g) 10H O(g)+ → +
B. –Na (g) Na (g) e+→ +
C. 2 4 2 4 2H SO (aq) 2KOH(aq) K SO (aq) 2H O(l)+ → +
D. 3 3NH (g) NH (l)→
16. Whichcombinationofionswillgivethegreatestabsolutelatticeenthalpy?
A. Asmallpositiveionwithahighchargeandasmallnegativeionwithahighcharge
B. Asmallpositiveionwithalowchargeandasmallnegativeionwithalowcharge
C. Alargepositiveionwithahighchargeandalargenegativeionwithahighcharge
D. Alargepositiveionwithalowchargeandasmallnegativeionwithalowcharge
17. Whichprocesswouldbeexpectedtohavea SÖë valuewhichisnegative?
A. 2 2 22H (g) O (g) 2H O(g)+ →
B. –NaCl (s) Na (g) Cl (g)+→ +
C. 2 2H (g) I (g) 2HI (g)+ →
D. 2 2 2OF (g) H O(g) O (g) 2HF(g)+ → +
18. Whensolidpotassiumchlorate,KClO3,dissolvesindistilledwaterthetemperatureofthesolutiondecreases.Whatarethesignsof H Öë , SÖë and GÖë forthisspontaneousprocess?
ÖëH ÖëS ÖëG
A. + + +
B. + + –
C. – – –
D. + – +
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19. WhichgraphbestrepresentstherelationshipbetweentheaveragekineticenergyofmoleculesofagasandtemperatureinK?
A. B.
Averagekineticenergy
Averagekineticenergy
Temperature/K Temperature/K
C. D.
Averagekineticenergy
Averagekineticenergy
Temperature/K Temperature/K
20. Forthegasphasereaction:
A(g) B(g) C(g)+ →
theexperimentallydeterminedrateexpressionis:rate=k[A][B]2
BywhatfactorwilltheratechangeiftheconcentrationofAistripledandtheconcentrationofBishalved?
A. 0.75
B. 1.5
C. 6
D. 12
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21. Whichgraphbestrepresentsasecond-orderreaction?
A. B.Concentration
ofreactant
Concentration
ofreactant
Time Time
C. D.
Concentration
ofreactant
Concentration
ofreactant
Time Time
22. Whichchangesoccurwhenthetemperatureisdecreasedinthefollowingequilibrium?
2 22BrCl (g) Br (g) Cl (g)+� –14kJH =Öë
Position of equilibrium Value of Kc
A. shiftstotheright decreases
B. shiftstotheright increases
C. shiftstotheleft decreases
D. shiftstotheleft increases
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23. Whengaseousnitrosylchloride,NOCl(g),decomposes,thefollowingequilibriumisestablished:
22NOCl(g) 2NO(g) Cl (g)+�
2.0mol of NOCl(g) were placed in a 1.0dm3 container and allowed to reach equilibrium.Atequilibrium1.0molofNOCl(g)waspresent.WhatisthevalueofKc?
A. 0.50
B. 1.0
C. 1.5
D. 2.0
24. Inwhichequilibriaaretheconjugateacid–basepairscorrectlylabelled?
I. 2– – –3 2 3CO (aq) H O(l) HCO (aq) OH (aq)+ +�
Base1 Acid2 Acid1 Base2
II. – –3 2 2 3HCO (aq) H O(l) H CO (aq) OH (aq)+ +�
Base1 Acid2 Acid1 Base2
III. 4 2 3 3NH (aq) H O(l) H O (aq) NH (aq)+ ++ +�
Acid1 Base2 Acid2 Base1
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
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25. AsolutionofacidHXhasapH=1andasolutionofacidHYhasapH=3.Whichstatementmust becorrect?
A. HXisastrongeracidthanHY.
B. HYisastrongeracidthanHX.
C. The[H+]inthesolutionofHXis100timesgreaterthanthe[H+]inthesolutionofHY.
D. The[H+]inthesolutionofHYis100timesgreaterthanthe[H+]inthesolutionofHX.
26. ThevaluesofKw,theionicproductconstantofwater,are:
Kw
6.4×10–15 181.0×10–14 25
Whichstatementsarecorrect?
I. The[OH–]inwaterislessthanthe[H+]at18 C° .
II. Theionizationofwaterisanendothermicprocess.
III. ThepHofwaterislowerat25 C° thanat18 C° .
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
T / C°
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27. Forwhichequilibriumcananexpressionforabasedissociationconstant,Kb,fortheforwardreactionbewritten?
A. 3 3 4 2NH H O NH H O+ ++ +�
B. –2F H O HF OH− + +�
C. –4 3 2NH OH NH H O+ + +�
D. – –2HF OH H O F+ +�
28. Whichofthefollowingmixtures,inanaqueoussolution,willproduceabuffersolution?
I. 50cm3of0.1moldm–3CH3COONaand50cm3of0.1moldm–3CH3COOH
II. 50cm3of0.1moldm–3NH3and50cm3of0.1moldm–3NH4Cl
III. 50cm3of0.1moldm–3NaOHand50cm3of0.2moldm–3CH3COOH
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
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29. Thecoloursofthreeindicatorsareshowninthetablebelow.
Indicator Colour at low pH
Colour at high pH
pH range at which colour change takes place
methylorange red yellow 3.2– 4.4
bromothymolblue yellow blue 6.0 –7.6
phenolphthalein colourless pink 8.2–10.0
Equal volumes of these three indicatorsweremixed and themixturewas added to a solution ofpH=5.0.Whatcolourwouldbeseen?
A. Yellow
B. Orange
C. Green
D. Blue
30. Whichstatementiscorrectaboutareducingagent?
A. Itisreducedbygainingelectrons.
B. Itisoxidizedbygainingelectrons.
C. Itisoxidizedbylosingelectrons.
D. Itisreducedbylosingelectrons.
31. Anaqueoussolutionofametalsaltiselectrolysed.Whichfactorwillhavenoeffectonthemassofthemetaldepositedonthenegativeelectrode(cathode),ifallothervariablesremainconstant?
A. Sizeofmetalion
B. Relativeatomicmassofmetal
C. Current
D. Chargeonmetalion
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32. Whicharecorrectstatementsaboutavoltaiccell?
I. Aspontaneousredoxreactionoccurswhichconvertschemicalenergytoelectricalenergy.
II. Oxidationoccursatthenegativeelectrode(anode).
III. Electricityisconductedbythemovementofelectronsthroughthesaltbridge.
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
33. Thestandardelectrodepotentialsofsomehalf-reactionsaregivenbelow.
4 – 2Sn (aq) 2e Sn (aq)+ ++ � 0.15 VE = +Ö
– –1
22 I (s) e I (aq)+ � 0.54 VE = +Ö
3 – 2Fe (aq) e Fe (aq)+ ++ � 0.77 VE = +Ö
Whichofthefollowingreactionswilloccurspontaneously?
A. IodinereducesFe3+toFe2+
B. IodinereducesSn4+toSn2+
C. IodineoxidizesFe2+toFe3+
D. IodineoxidizesSn2+toSn4+
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34. WhatisthenameofthefollowingcompoundapplyingIUPACrules?
A. cis-4-methylhex-2-ene
B. cis-4-ethylpent-2-ene
C. trans-4-methylhex-2-ene
D. trans-4-ethylpent-2-ene
35. Whichstepsareinvolvedinthefree-radicalmechanismofthebrominationofethaneinthepresenceofultravioletradiation?
I. 2 6 2 5C H Br C H HBr+ → +i i
II. 2 5 2 2 5C H Br C H Br Br+ → +i i
III. 2 5 2 5C H Br C H Br+ →i i
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
C
H
H
H
H H
HH
HH
HH
H
H
H
C
C C
CC C
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36. Whichsubstancecanbepolymerizedtoproducethepolymerbelow?
C
CH3
H
C
H
H
C
H
CH3
C
H
H
C
CH3
H
C
H
H
C
H
C
H
HCH3
A. But-1-ene
B. But-2-ene
C. Propene
D. 2-methylpropene
37. Whichfactorsaffecttherateofnucleophilicsubstitutioninhalogenoalkanes?
I. Thenatureoftheattackingnucleophile
II. Theidentityofthehalogen
III. Thestructureofthehalogenoalkane
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
38. Whichmoleculeexhibitsopticalisomerism?
A. 3-chloropentane
B. 2-chlorobutane
C. 1,3-dichloropropane
D. 2-chloro-2-methylpropane
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39. Whatisauseoftheorganicproductformedwhenanalcoholandacarboxylicacidreacttogether?
A. Pesticide
B. Lubricant
C. Flavouringsinfood
D. Fertilizer
40. Which would be the best method to decrease the random uncertainty of a measurement in anacid–basetitration?
A. Ensureyoureyeisatthesameheightasthemeniscuswhenreadingtheburette.
B. Useadifferentindicatorforthetitration.
C. Useadifferentburette.
D. Repeatthetitration.
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