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ChemistryStandard levelPaper 1
13 pages
Wednesday 8 November 2017 (afternoon)
45 minutes
N17/4/CHEMI/SPM/ENG/TZ0/XX
© International Baccalaureate Organization 20178817 – 6104
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].
88 Ra
(226
)
56 Ba
137.
33
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
.87
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
3.84
42 Mo
95.9
6
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
)
93 Np
(237
)
61 Pm (145
)
75 Re
186.
21
43 Tc (98)25 Mn
54.9
4
94 Pu (244
)
62 Sm15
0.36
76 Os
190.
23
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
5.08
46 Pd10
6.42
28 Ni
58.6
9
97 Bk
(247
)
65 Tb15
8.93
79 Au
196.
97
47 Ag
107.
87
29 Cu
63.5
5
The
Perio
dic
Tabl
e
Ato
mic
num
ber
Elem
ent
Rel
ativ
e at
omic
mas
s
98 Cf
(251
)
66 Dy
162.
50
80 Hg
200.
59
48 Cd
112.
41
30 Zn 65.3
8
99 Es (252
)
67 Ho
164.
93
81 Tl20
4.38
49 In11
4.82
31 Ga
69.7
2
13 Al
26.9
8
5 B10
.81
13
100
Fm (257
)
68 Er16
7.26
82 Pb 207.
2
50 Sn11
8.71
32 Ge
72.6
3
14 Si28
.09
6 C12
.01
14
101
Md
(258
)
69 Tm16
8.93
83 Bi
208.
98
51 Sb12
1.76
33 As
74.9
2
15 P30
.97
7 N14
.01
15
102
No
(259
)
70 Yb17
3.05
84 Po (209
)
52 Te12
7.60
34 Se78
.96
16 S32
.07
8 O16
.00
16
103
Lr (262
)
71 Lu17
4.97
85 At
(210
)
53 I12
6.90
35 Br
79.9
0
17 Cl
35.4
5
9 F19
.00
17
86 Rn
(222
)
54 Xe13
1.29
36 Kr
83.9
0
18 Ar
39.9
5
10 Ne
20.1
8
2 He
4.0018
34
56
78
910
1112
1 2 3 4 5 6 710
4 R
f(2
67)
105
Db
(268
)
106
Sg (269
)
107
Bh
(270
)
108
Hs
(269
)
109
Mt
(278
)
110
Ds
(281
)
111
Rg
(281
)
112
Cn
(285
)
113
Unt
(286
)
114
Uug
(289
)
115
Uup
(288
)
116
Uuh
(293
)
117
Uus
(294
)
118
Uuo
(294
)
– 2 – N17/4/CHEMI/SPM/ENG/TZ0/XX
1. How many atoms of nitrogen are there in 0.50 mol of (NH4)2CO3?
A. 1
B. 2
C. 3.01 × 1023
D. 6.02 × 1023
2. What is the value of x when 32.2 g of Na2SO4·xH2O are heated leaving 14.2 g of anhydrous Na2SO4? Mr (H2O) = 18; Mr (Na2SO4) = 142.
Na2SO4·xH2O (s) → Na2SO4 (s) + xH2O (g)
A. 0.1
B. 1
C. 5
D. 10
3. How many grams of sodium azide, NaN3, are needed to produce 68.1 dm3 of N2 (g) at STP?
Molar volume at STP = 22.7 dm3 mol-1; Mr (NaN3) = 65.0
2NaN3 (s) → 3N2 (g) + 2Na (s)
A. 32.5
B. 65.0
C. 130.0
D. 195.0
4. Whatisthesumofthecoefficientswhenthefollowingequationisbalancedusingthesmallestwholenumbers?
__C6H12O6(aq)→ __C2H5OH(aq)+ __CO2 (g)
A. 4
B. 5
C. 9
D. 10
Turn over
– 3 – N17/4/CHEMI/SPM/ENG/TZ0/XX
5. Whatisthenumberofprotonsandthenumberofneutronsin131I?
Protons Neutrons
A. 53 78
B. 53 131
C. 78 53
D. 131 53
6. Whichistheelectronconfigurationofachromiumatominthegroundstate?
A. [Ne]3s23p64s13d4
B. [Ar]3d3
C. 1s22s22p63s23p64s23d4
D. [Ar]4s13d5
7. Which trends are correct across period 3 (from Na to Cl)?
I. Atomic radius decreasesII. Melting point increasesIII. First ionization energy increases
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
– 4 – N17/4/CHEMI/SPM/ENG/TZ0/XX
8. WhichoxidedissolvesinwatertogiveasolutionwithapHbelow7?
A. MgO
B. Li2O
C. CaO
D. P4O10
9. The electronegativity values of four elements are given.
C N O F2.6 3.0 3.4 4.0
What is the order of increasing polarity of the bonds in the following compounds?
A. CO < OF2 < NO < CF4
B. CF4 < CO < OF2 < NO
C. NO < OF2 < CO < CF4
D. CF4 < NO < OF2 < CO
10. WhichcompoundhastheshortestC–Nbond?
A. CH3NH2
B. (CH3)3CNH2
C. CH3CN
D. CH3CHNH
Turn over
– 5 – N17/4/CHEMI/SPM/ENG/TZ0/XX
11. Whichofthefollowingseriesshowsincreasinghydrogenbondingwithwater?
A. Propane < propanal < propanol < propanoic acid
B. Propane < propanol < propanal < propanoic acid
C. Propanal < propane < propanoic acid < propanol
D. Propanoic acid < propanol < propanal < propane
12. Which statements are correct for metals?
I. Theyconductelectricitybecausetheyhavefreemovingions.II. They consist of a close-packed lattice of positive ions with delocalized electrons.III. Theyaremalleablebecausethelayersofpositiveionscanslideovereachother.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
13. Which statement is correct for this reaction?
Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2(g)∆H = -26.6 kJ
A. 13.3 kJ are released for every mole of Fe produced.
B. 26.6kJareabsorbedforeverymoleofFeproduced.
C. 53.2 kJ are released for every mole of Fe produced.
D. 26.6 kJ are released for every mole of Fe produced.
– 6 – N17/4/CHEMI/SPM/ENG/TZ0/XX
14. The enthalpy changes for two reactions are given.
Br2 (l) + F2 (g) →2BrF(g)∆H = x kJBr2 (l) + 3F2 (g) → 2BrF3(g)∆H = y kJ
What is the enthalpy change for the following reaction?
BrF (g) + F2 (g) → BrF3 (g)
A. x - y
B. -x + y
C. 12
(-x + y)
D. 12
(x - y)
15. What is the enthalpy change, in kJ, of the following reaction?
3H2 (g) + N2 (g) � 2NH3 (g)
Bond Bond enthalpy / kJ mol-1
N≡N 945H-H 436N-H 391
A. (6 × 391) - [(3 × 436) + 945]
B. (3 × 391) - (436 + 945)
C. -[(3 × 436) + 945] + (3 × 391)
D. -(6 × 391) + [(3 × 436) + 945]
Turn over
– 7 – N17/4/CHEMI/SPM/ENG/TZ0/XX
16. Thediagramshowstheenergyprofileforacatalysedanduncatalysedreaction.Whichrepresentstheenthalpychange,∆H, and the activation energy, Ea, for the catalysed reaction?
x
y
zPote
ntia
l ene
rgy
Reaction coordinate
∆H Ea (catalysed reaction)
A. z x + z
B. z z + y
C. -z x
D. z + x x
– 8 – N17/4/CHEMI/SPM/ENG/TZ0/XX
17. Excessmagnesiumpowderwasaddedtoabeakercontaininghydrochloricacid,HCl(aq). Themassofthebeakeranditscontentswasrecordedandplottedagainsttime(lineI).
Mass
Time
I
II
Which change could give line II?
A. DoublingthemassofpowderedMg
B. UsingthesamemassofMgribbon
C. Increasing the temperature
D. Using the same volume of more concentrated HCl
18. Whatwillhappenifthepressureisincreasedinthefollowingreactionmixtureatequilibrium?
CO2 (g) + H2O (l) � H+(aq)+ HCO3-(aq)
A. TheequilibriumwillshifttotherightandpHwilldecrease.
B. TheequilibriumwillshifttotherightandpHwillincrease.
C. TheequilibriumwillshifttotheleftandpHwillincrease.
D. TheequilibriumwillshifttotheleftandpHwilldecrease.
Turn over
– 9 – N17/4/CHEMI/SPM/ENG/TZ0/XX
19. 10.0 cm3ofanaqueoussolutionofsodiumhydroxideofpH= 10 is mixed with 990.0 cm3 of distilled water. What is the pH of the resulting solution?
A. 8
B. 9
C. 11
D. 12
20. Which statement is incorrect for a 0.10 mol dm-3 HCOOH solution?
A. pH = 1
B. [H+ ] << 0.10 mol dm-3
C. [HCOO- ]isapproximatelyequalto[H+ ]
D. HCOOH is partially ionized
21. What are the oxidation states of chromium in (NH4)2Cr2O7 (s) and Cr2O3 (s)?
(NH4)2Cr2O7 (s) Cr2O3 (s)
A. +7 +3
B. +6 +3
C. +6 +6
D. +7 +6
22. Which of the following is a redox reaction?
A. 3Mg (s) + 2AlCl3(aq)→ 2Al (s) + 3MgCl2(aq)
B. SiO2 (s) +2NaOH(aq)→ Na2SiO3(aq)+ H2O (l)
C. KCl(aq)+ AgNO3(aq)→ AgCl (s) + KNO3(aq)
D. 2NaHCO3(aq)→ Na2CO3(aq)+ CO2 (g) + H2O (l)
– 10 – N17/4/CHEMI/SPM/ENG/TZ0/XX
23. What is the reaction type and major product at the anode (positive electrode) when molten sodium chloride is electrolysed using platinum electrodes?
Reaction type Product
A. reduction Cl2
B. oxidation Cl2
C. reduction Na
D. oxidation Na
24. WhatisthemajorproductofthereactionbetweenHClandbut-2-ene?
A. 1,2-dichlorobutane
B. 2,3-dichlorobutane
C. 1-chlorobutane
D. 2-chlorobutane
25. Whichcompoundcanbeoxidizedwhenheatedwithanacidifiedsolutionofpotassiumdichromate(VI)?
A. CH3C(O)CH2CH3
B. CH3CH2CH(OH)CH3
C. (CH3)3COH
D. CH3(CH2)2COOH
Turn over
– 11 – N17/4/CHEMI/SPM/ENG/TZ0/XX
26. What is the name of this compound, using IUPAC rules?
C
C
O
C
C
C HH
HH
HH
HHH
H
H H
A. 3-methylbutan-3-ol
B. 2-ethylpropan-2-ol
C. 2-methylbutan-2-ol
D. 3-methylbutan-2-ol
27. Whichtypeofreactionoccursbetweenanalcoholandacarboxylicacid?
A. Addition
B. Oxidation
C. Esterification
D. Polymerization
28. How many structural isomers of C6H14 exist?
A. 4
B. 5
C. 6
D. 7
– 12 – N17/4/CHEMI/SPM/ENG/TZ0/XX
29. Whatinformationisprovidedby1H NMR, MS and IR for an organic compound?
I. 1H NMR: chemical environment(s) of protonsII. MS: fragmentation patternIII. IR: types of functional group
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
30. Astudentperformsanacid-basetitrationusingapHmeter,butforgetstocalibrateit.Whichtypeoferrorwilloccurandhowwillitaffectthequalityofthemeasurements?
A. Random error and lower precision
B. Systematic error and lower accuracy
C. Systematic error and lower precision
D. Random error and lower accuracy
– 13 – N17/4/CHEMI/SPM/ENG/TZ0/XX