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2212-6110 15 pages
M12/4/CHEMI/SPM/ENG/TZ1/XX
Tuesday 8 May 2012 (afternoon)
CHEMISTRYSTANDARD 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 [30 marks].
45 minutes
© International Baccalaureate Organization 2012
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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
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1. Howmanyatomsofhydrogenarein0.500molofCH3OHmolecules?
A. 231.20 10×
B. 233.01 10×
C. 236.02 10×
D. 241.20 10×
2. 1molofahydrocarbonwithgeneralformulaCnH2n+2reactscompletelywithoxygentoproduce4molofH2O.Whatistheamountofoxygenmolecules,inmol,thatreacts?
A. 4
B. 5
C. 6
D. 7
3. Underwhichcombinationofconditionsis1molofanidealgaspresent?
Volume Pressure Temperature
A. 22.4dm3 101Pa 273K
B. 22.4m3 101Pa 298K
C. 22.4dm3 101kPa 273K
D. 22.4m3 101kPa 298K
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4. Afixedmassofanidealgasat27.0 C° and 51.01 10× Pahasavolumeof100cm3. Whichchangedoublesthevolumeofthegas?
A. Heatingthegasatconstantpressureto54.0 C° .
B. Heatingthegasatconstantpressureto327 C° .
C. Increasingthepressureonthegasto 52.02 10× Paatconstanttemperature.
D. Heatingthegasto54.0 C° andincreasingthepressureto 52.02 10× Pa.
5. 10cm3ofasolutionof1.0moldm–3NaOH(aq)isdilutedwithwateruntilthefinalvolumeis100cm3.Whatistheconcentration,inmoldm–3,ofthenewsolution?
A. 0.10
B. 1.0
C. 10.0
D. 0.01
6. Whichisotopehasanatomicnumberof9andamassnumberof19?
A. 9F
B. 19K
C. 19F
D. 28Si
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7. An16Oatom,an16O+ionandan18O+ion,alltravellingatthesamevelocity,enterintothemagneticfieldofamassspectrometer.Whichisthepathofeachoftheparticles?
16O 16O+ 18O+
A. X Y Z
B. Y Z X
C. X Z Y
D. Z X Y
8. Whichsequenceofelementsisinorderofincreasingelectronegativity?
A. Li<Na<Rb
B. O<N<C
C. F<Cl<Br
D. Si<P<S
9. Whichcombinationofdescriptionsiscorrectfortheoxidesofperiod3elements?
Chlorine Magnesium Silicon Sodium
A. basic acidic basic acidic
B. acidic basic basic basic
C. basic acidic acidic acidic
D. acidic basic acidic basic
X
YZ
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10. Whichsubstancehasthegreatestbondlengthbetweenthecarbonatoms?
A. C2H2
B. C2H4
C. C2H6
D. C2Cl4
11. Whichsubstancehasahighmeltingpointandconductselectriccurrentinthesolidstate?
A. Potassium
B. Potassiumchloride
C. Graphite
D. Silicondioxide
12. Whichstatementaboutintermolecularforcesiscorrect?
A. The intermolecular force between H2 molecules is hydrogen bonding, because H2 hastemporarydipoles.
B. TheintermolecularforcesbetweenPH3moleculesaregreater than the intermolecularforcesbetweenNH3molecules,becausetheyhaveagreatermass.
C. TheintermolecularforcebetweenH2moleculesishydrogenbonding,becauseH2haspermanentdipoles.
D. The intermolecular forces between Br2 molecules are van der Waals’, because Br2 hastemporarydipoles.
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13. Whichsubstancesaresolubleinhexane,C6H14?
I. C8H18
II. CH4
III. H2O
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
14. Whataretheunitsforspecificheatcapacity?
A. kJkgK
B. kJkgK–1
C. kJkg–1K
D. kJkg–1K–1
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15. Ineachoftwodifferentexperiments,AandB,asolutionofsodiumhydroxideisaddedtoasolutionofhydrochloricacid.Theinitialtemperatureofeachsolutionis25 C° .
ExperimentA ExperimentB
Whichstatementiscorrect?
A. ThehighestrecordedtemperatureofexperimentAislowerthanthehighestrecordedtemperatureofexperimentB.
B. Thehighestrecordedtemperatureofbothexperimentsisequal.
C. TheheatproducedinexperimentAislowerthantheheatproducedinexperimentB.
D. Theheatproducedinbothexperimentsisequal.
16. Theenthalpychanges,inkJ,forthefollowingtworeactionsarexandy.
2 4 2 4 2 22N H (l) N O (l) 3N (g) 4H O(g)+ → +
H x=Öë
2 4 2 2 2N H (l) O (g) N (g) 2H O(g)+ → + H y=Öë
Whatistheenthalpychange,inkJ,forthereaction?
2 4 2 2 4 2N H (l) 3O (g) N O (l) 2H O(g)+ → +
A. x–y
B. y–x
C. 3x–y
D. 3y–x
50cm3
1.0moldm–3NaOH(aq)50cm3
1.0moldm–3NaOH(aq)
50cm3
1.0moldm–3HCl(aq)100cm3
1.0moldm–3HCl(aq)
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17. Identicalpiecesofcalciumcarbonateareaddedtotwoseparateflaskscontainingexcess0.1moldm–3
hydrochloricacidatdifferenttemperatures.Themassesofthecontentsoftheflasksaremonitored.Whichgraphrepresentsthereactionatthehighertemperature?
A.
Masso
fcontentso
fflask/g
B.
Masso
fcontentso
fflask/g
0 2 4 6 0 2 4 6Time/min Time/min
C.
Masso
fcontentso
fflask/g
D.Masso
fcontentso
fflask/g
0 2 4 6 0 2 4 6Time/min Time/min
50454035302520151050
50454035302520151050
50454035302520151050
50454035302520151050
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18. TheMaxwell–Boltzmanncurvebelowshowsthedistributionofkineticenergiesfortheparticlesinasampleofgas.
Numberofparticles
KineticEnergy
Whichistheshapeofthecurveforthesamesampleofgasatahighertemperature?Allgraphsaredrawntothesamescale.
A. Numberofparticles
B. Numberofparticles
KineticEnergy KineticEnergy
C. Numberofparticles
D. Numberofparticles
KineticEnergy KineticEnergy
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19. Thegraphrepresentstheratesoftheforwardandbackwardreactionsofareversiblereaction.
Rateofreaction
Time
Whichstatementiscorrect?
A. XWZrepresentstherateoftheforwardreaction.
B. AtY,therateoftheforwardandbackwardreactionsiszero.
C. BetweenWandZ,theconcentrationsofproductsandreactantsareequal.
D. BetweenYandW,theconcentrationofthereactantsincreases.
20. TheproductionofsulfuricacidbytheContactprocessinvolvesthefollowingequilibrium.
12 2 32SO (g) O (g) 2SO (g) 196 kJmolH −+ = −
Öë
Whichstatementabouttheprocessiscorrect?
A. Anincreaseintemperaturewouldshifttheequilibriumtotheright.
B. Anincreaseintemperaturewouldincreasetherateofreaction.
C. Thepresenceofacatalystwouldshifttheequilibriumtotheright.
D. Anincreaseinpressurewouldshifttheequilibriumtotheleft.
X
W Z
Y
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21. Whichareconjugateacid/basepairsaccordingtotheBrønsted–Lowrytheory?
I. NH4+/NH3
II. HCOOH/HCOO–
III. H2SO4/SO42–
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
22. 10cm3 ofNaOH solution is dilutedwith an equal volume ofwater. Which shows correctly thechangesintheconcentrationofhydroxideionsandthepH?
[OH–] pH
A. increases increases
B. increases decreases
C. decreases increases
D. decreases decreases
23. Whataretheoxidationnumbersofsulfurinthespeciesbelow?
SO32– NaHSO4 H2S
A. +2 +6 +2
B. +6 +4 +2
C. +4 +6 –2
D. +6 +2 –2
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24. Theequationfortheredoxreactionbetweenacidifieddichromateandiodideionsisshownbelow.
2– – 32 7 2 2Cr O (aq) 6I (aq) 14H (aq) 2Cr (aq) 3I (aq) 7H O(l)+ ++ + → + +
Whichisthereductionhalf-equation?
A. –26I (aq) 6e 3I (aq)−+ →
B. –26I (aq) 3I (aq) 6e−→ +
C. 2– 32 7 2Cr O (aq) 14H (aq) 6e 2Cr (aq) 7H O(l)+ − ++ + → +
D. 2– 32 7 2Cr O (aq) 14H (aq) 2Cr (aq) 7H O(l) 6e+ + −+ → + +
25. Theequationfortheoverallreactioninavoltaiccellis:
2 2Cu (aq) Zn (s) Cu (s) Zn (aq)+ ++ → +
Whichstatementsarecorrectforthiscell?
I. Cuisthepositiveelectrode.
II. Negativeionsflowfromthezincsolutiontothecoppersolution.
III. Chemicalenergyisconvertedintoelectricalenergyduringthisreaction.
A. IandIIonly
B. IandIIIonly
C. IIandIIIonly
D. I,IIandIII
26. HowmanyisomershavethemolecularformulaC5H12?
A. 2 B. 3
C. 4
D. 5
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27. Whichfunctionalgroupsarepresentinthismolecule?
COOC H㌀
CH ㌀
A. Esterandmethyl
B. Ketoneandmethyl
C. Benzeneringandester
D. Benzeneringandketone
28. Whichreactionofbut-2-eneproduces2-chlorobutane?
A. Additionreactionwithchlorine B. Substitutionreactionwithhydrogenchloride
C. Substitutionreactionwithchlorine
D. Additionreactionwithhydrogenchloride
29. Whatarethecorrectnamesofthereactiontypesshown?
3 2 3 2 2 3 2 2 3CH CH CH ClCH CH CH HOCH CH CH→ →I II
I II
A. nucleophilicsubstitution oxidation
B. free-radicalsubstitution oxidation
C. nucleophilicsubstitution nucleophilicsubstitution
D. free-radicalsubstitution nucleophilicsubstitution
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30. Astudentmeasured themassofasolidonananalyticalbalanceduringan internallyassessed IBpracticalexperimentandrecordedthemassinhisrawdata.Theaccuracyofthebalance,asstatedbythemanufacturers,was±0.01g. Whichof thefollowingchoiceswouldbe thebest recordofhismass?
A. 10.2g B. 10g
C. 10.20g
D. 10.200g