Chemistry
Higher Level
Paper 1
Name:_________________________________
Date: __________________________________
Score:__________________________________
Instructions to candidates
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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 [15 marks]
Weight: 20%
Mock Exam 2022 [40 marks]
1. [1 mark]
Which contains the most atoms of oxygen?
A. 64 g of O2
B. 1.2 × 1024 molecules of O2
C. 64 g of C3H5O3
D. 1.2 × 1024 molecules of C3H5O3
2. [1 mark]
Which substance is most likely to be ionic?
3. [1 mark]
Along which series is the bond angle increasing?
A. NH3 , H2O , CH4
B. CH4 , NH3 , H2O
C. H2O , NH3 , CH4
D. H2O , CH4 , NH3
4. [1 mark]
What is the enthalpy change, in J, when 5 g of water is heated from 10°C to 18°C?
Specific heat capacity of water: 4.18 kJ kg−1 K−1
A. 5 × 4.18 × 8
B. 5 × 10−3 × 4.18 × 8
C. 5 × 4.18 × (273 + 8)
D. 5 × 10−3 × 4.18 × (273 + 8)
5. [1 mark]
Curve 1 shows the mass change when marble chips are added to excess hydrochloric acid in an
open beaker.
Which changes would produce curve 2?
A. Powdering the marble chips and heating
B. Powdering the marble chips and doubling their mass
C. Doubling the volume of acid and heating
D. Doubling the acid concentration and powdering the marble chips
6. [1 mark]
Which changes produce the greatest increase in the percentage conversion of methane?
CH4 (g) + H2O (g) ⇌ CO (g) + 3H2 (g)
7. [1 mark]
What is the resulting concentration, in mol dm−3, when 1.0 cm3 of 0.500 mol dm−3 nitric
acid solution is diluted to 50.0 cm3 with water?
A. 0.002
B. 0.01
C. 0.04
D. 0.1
8. [1 mark]
Which solution has a pH of 9?
A. 1.0 × 10−9 mol dm−3 HCl (aq)
B. 1.0 × 10−5 mol dm−3 KOH (aq)
C. 1.0 × 10−9 mol dm−3 KOH (aq)
D. 1.0 × 10−5 mol dm−3 HCl (aq)
9. [1 mark]
What is correct for this redox reaction?
MnO2 (s) + 2I− (aq) + 4H+ (aq) → Mn2+ (aq) + I2 (aq) + 2H2O (l)
10. [1 mark]
Which series is in order of increasing boiling point?
A. CH2CH2CH3OH CH3COCH3
CH3CH2CH3
B. CH3CH2CH3
CH3COCH3
CH2CH2CH3OH
C. CH3COCH3
CH2CH2CH3OH CH3CH2CH3
D. CH3CH2CH3
CH2CH2CH3OH CH3COCH3
11. [1 mark]
What is the name of this compound, applying IUPAC rules?
A. 4-methylhex-2-ene
B. 4-ethylpent-2-ene
C. 2-ethylpent-3-ene
D. 3-methylhex-4-ene
12. [1 mark]
What is formed in a propagation step of the substitution reaction between bromine and
ethane?
A. CH3CH2•
B. CH3CH2CH2CH3
C. H•
D. Br−
13. [1 mark]
Which monomer would produce the polymer shown?
A. CF! CCl" F
B. CF! CClHF
C. CF" CClF
D. CF" CF"
14. [1 mark]
Burette readings for a titration are shown.
What is the mean titre?
A. 11.1 cm3 ± 0.1 cm3
B. 11.15 cm3 ± 0.05 cm3
C. 11.2 cm3 ± 0.05 cm3
D. 11.2 cm3 ± 0.1 cm3
15. [1 mark]
What volume of oxygen, in dm3 at STP, is needed when 5.8 g of butane undergoes complete
combustion?
2𝐶# 𝐻$% (𝑔) + 13𝑂" (𝑔) → 8𝐶𝑂" (𝑔) + 10𝐻" 𝑂(𝑙)
&.(
A. 2 × $".%$×#*$.%$×$% × 13 × 22.7
B.
C.
D.
&.(
$".%$×#*$.%$×$%
×
&.(
$!
"
× 22.7
"
× $! × 22.7
$".%$×#*$.%$×$%
&.(
$".%$×#*$.%$×$%
×
$!
"
"".+
× $%%%
16. [1 mark]
Determine the index of hydrogen deficiency (IHD) of paracetamol.
A. 3
B. 4
C. 5
D. 6
17. [1 mark]
What is the relative molecular mass of bromine, according to the following mass spectrum?
NIST Mass Spectrometry Data Center Collection © 2014 copyright by the U.S. Secretary of
Commerce
on behalf of the United States of America. All rights reserved.
A.
$&(×&"*$,%×$%%*$,"×#(
B.
$&(×&"*$,%×$%%*$,"×#(
C.
+-×$$*($×$$*$&(×&"*$,%×$%%*$,"×#(
D.
+-×$$*($×$$
&"*$%%*#(
$&(*$,%*$,"
$$*$$*&"*$%%*#(
$$*$$
18. [1 mark]
Which represents a p orbital?
19. [1 mark]
Which species has the same electron configuration as argon?
A. Br−
B. Ca2+
C. Al3+
D. Si4+
20. [1 mark]
Which trend is correct, going down group 1?
A. Melting point increases
B. Reactivity decreases
C. First ionisation energy increases
D. Electronegativity decreases
21. [1 mark]
The Lewis structure of methylamine is shown.
What is the molecular geometry around N?
A. Square planar
B. Tetrahedral
C. Trigonal planar
D. Trigonal pyramidal
22. [1 mark]
0.20 mol of magnesium is mixed with 0.10 mol of hydrochloric acid.
Which is correct?
23. [1 mark]
Which is the enthalpy change of reaction, ΔH?
24. [1 mark]
The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain
temperature.
How would the curve change if the temperature of the gas decreases while the other conditions
remain constant?
A. The maximum would be lower and to the left of M.
B. The maximum would be lower and to the right of M.
C. The maximum would be higher and to the left of M.
D. The maximum would be higher and to the right of M.
25. [1 mark]
Which cannot act as a Brønsted–Lowry base?
A. HPO42−
B. H2O
C. CH4
D. NH3
26. [1 mark]
Which causes acid deposition?
A. SO2
B. SiO2
C. SrO
D. CO2
27. [1 mark]
How are emission spectra formed?
A. Photons are absorbed when promoted electrons return to a lower energy level.
B. Photons are absorbed when electrons are promoted to a higher energy level.
C. Photons are emitted when electrons are promoted to a higher energy level.
D. Photons are emitted when promoted electrons return to a lower energy level.
28. [1 mark]
A reaction proceeds by the following mechanism:
step 1: 𝐴 + 𝐴 → 𝐵
step 2: 𝐵 + 𝐶 → 𝐷
Which rate equation is consistent with this mechanism?
A. Rate = k[B]2[C]
B. Rate = k[A]2[B][C]
C. Rate = k[A]2
D. Rate = k[A][C]
29. [1 mark]
Which graphs show a first order reaction?
A. V and X
B. V and Y
C. W and X
D. W and Y
30. [1 mark]
Which gives the equation and cell potential of the spontaneous reaction?
31. [1 mark]
What is the product of the reaction of benzene with a mixture of concentrated nitric and
sulfuric acids?
32. [1 mark]
How many chiral centres are there in the following molecule?
A. 2
B. 3
C. 4
D. 6
33. [1 mark]
The diagram shows the first ionisation energies of consecutive elements in the same period of
the periodic table.
Which factor explains why element X has a higher first ionisation energy than element Y?
A. Element Y loses an electron from a different sub-level.
B. Element Y has a smaller atomic radius.
C. Element X has a full octet.
D. Element Y has a greater nuclear charge.
34. [1 mark]
What is the overall charge, 𝑥, of the chromium (III) complex?
[𝐶𝑟(𝐻" 𝑂)# 𝐶𝑙" ] .
A. 0
B. 1+
C. 2−
D. 3+
35. [1 mark]
What is the electron domain geometry of Si in SiO2?
A. bent
B. linear
C. square planar
D. tetrahedral
36. [1 mark]
Which represents electron affinity?
A. Al2+ (g) → Al3+ (g) + e−
B. C (g) + e− → C− (g)
C. Cl2 (g) → 2Cl (g)
D. S (s) → S+ (g) + e−
37. [1 mark]
Which change results in the largest negative value of ΔS?
A. C2H5OH (l) + SOCl2 (l) → C2H5Cl (l) + SO2 (g) + HCl (g)
B. CaCO3 (s) → CaO (s) + CO2 (g)
C. H2O (l) → H2O (s)
D. NH3 (g) + HCl (g) → NH4Cl (s)
38. [1 mark]
Which is correct?
A. Electrophiles are Brønsted–Lowry acids.
B. Nucleophiles are Brønsted–Lowry acids.
C. Electrophiles are Lewis acids.
D. Nucleophiles are Lewis acids.
39. [1 mark]
What is the hybridization of the circled carbon, oxygen and nitrogen atoms?
40. [1 mark]
Which is correct for a redox reaction where the standard electrode potential is negative?
ΔGΘ = −nFEΘ and ΔGΘ = −RT ln K
A. ΔGΘ is negative and K is less than 1.
B. ΔGΘ is negative and K is greater than 1.
C. ΔGΘ is positive and K is less than 1.
D. ΔGΘ is positive and K is greater than 1.