3
5 csonn_topical_MCQs
The diagram shows the variation of the boiling points of the hydrogen halides.
2
4
11) Nov04/8
Section A
Use of the Data Booklet is relevant to this question.
b.p.
3 and D. Choose the one you consider to
For each
there
arethe
four
possible
answers,
Whichquestion
expression
gives
pressure
exerted
by 1.6A,x B,
10–C,
mol of N2 in a container of volume
3
o
be correct.
3.0 dm at 273 C?
8
1.6 x10 −3 x 8.31 x 273
Pa
x 10 − 6 tetraethyl-lead(IV),
The petrol3.0
additive
4, is now
HF Pb(C
HCl 2H5)HBr
HIbanned in many countries. When it is
A
1
completely burned
in air, lead(II) oxide, CO2 and H2O are formed.
1.6 x 10 − 3 x 8.31 x (273 + 273)
B
Pahydrogen fluoride?
What explains the higher
boiling point of
−6
3.0 xof
10oxygen
How many moles
are required to burn one mole of Pb(C2H5)4?
A The bond
energy of HF molecules is greater than in other hydrogen halides.
1.6 x 10 − 3 x 8.31 xB273 11
A
C 13.5
D 27
Pa
C 9.5
−3
B The effect
of
nuclear
shielding
is
much
reduced
in
fluorine
which
polarises the HF molecule.
3.0 x 10
2
C Thexelectronegativity
fluorine
is much higher than for other elements in the group.
)
+ 273
10 − 3 x 8.31 x (273 of
Pa
D 1.6ion
Which
has more electrons
than protons
and more protons than neutrons?
−3
3.0 x 10 bonding between HF molecules.
D There is hydrogen
[H = 11 H ; D =
12) June05/6
96
2
1H
;O=
16
8 O]
Which
of these compounds,
on complete
combustion
one mole, will release the greatest
Three–substances,
R, S, T, have
physical properties
as of
shown.
C OD–
D OH–
A
D of energy? B H3O+
amount
A
CH3CH2CH2OH
electrical conductivity
o
o
substance
mp
/
C
bp
/
C
3 What
is3CH
the2CH
electronic
configuration of an element with a second ionisation energy higher than
B CH
3
of solid
of liquid
that of each of its neighbours in the Periodic Table?
C CH3CH2CO2H
R 2 6 2 801
1413
poor
good
2p 3s
A 1s22s
D CH3COCH3
S
2852
3600
poor
good
B 1s22s22p63s23p1
T 2 6 2 3550
4827
good
not known
10 C
At high
2s 2p 3s 3p2 steam decomposes into its elements according to the following equation.
1s2temperatures,
2
6 the
3
be
identities
of R,
S and T ? 2H (g) + O (g)
2s22p
3s23p
DWhat
1scould
2H2O(g)
2
2
4
In one experiment
it was found
R at 1 atm pressure,
S
T that 20 % of the steam had been converted into
hydrogen
and
oxygen.
Which compound has a boiling point that is influenced by hydrogen bonding?
A
NaF
KCl
Cu
WhatCH
are
the values of the equilibrium partial pressures, in atm, of the components of this
A
3CHO
B
NaBr
BaO
SiO2
equilibrium?
B
CH3OCH3
NaCl
partial
C D HCO2HNaBrpressure
C
of steam
HCO2CH
3
0.80
x 1
D
A
1.0
0.10 x 1
1.0
0.10 x 1
1.0
0.80 x 1
0.133 x 1
0.067 x 1
13) Nov05/5
5
6
MgO
C [graphite]
partial pressure
partial pressure
CaO
C [diamond]of oxygen
of hydrogen
Which
B gas is likely
1.0 to deviate most
1.0from ideal gas behaviour?
1.0
A CHCl
0.80 x 1B
1.0
D
0.80 x 1
1.1
Given
and
© UCLES
2005
D
1.0
0.20 x 1
1.1
0.10 x 1
1.1
∆H of = –297 kJ mol –1
N2
∆H of = –395 kJ mol –1
enthalpy change of reaction,9701/01/M/J/05
∆H o, of 2SO2(g) + O2(g) → 2SO3(g)?
–196 kJ mol –1
© UCLES 2004
x 1
CH0.10
4
1.0
S(s) + O2(g) → SO2(g),
S(s) + 121 O2(g) → SO3(g)
© UCLES
what2005
is the
A
He 0.20 x 1 C
B
–98 kJ mol –1
C
+98 kJ mol –1
D
[Turn over
+196 kJ mol –1
9701/01/O/N/04
9701/01/O/N/05
51
31 Which of the following molecules and ions have a regular trigonal planar shape?
1
Al Cl3
+
csonn_topical_MCQs
2 CH3
3
PH3
14) June05/32
32 A quantity of solid Y was placed in a previously evacuated vessel and the apparatus was then
held at a series of different temperatures. At each temperature, the mass of Y in the vapour state
was calculated from pressure measurements. The results are shown below.
mass of
vapour
m
T
temperature
What can be deduced from the diagram?
1
The mass of Y used in the experiment was m.
2
The pressure of the vapour was constant for all temperatures above temperature T.
3
Liquid appeared at temperature T.
3
15) June06/5
3
5
5
In which process are hydrogen bonds broken?
In which process are hydrogen bonds broken?
A H2(l) → H2(g)
A H2(l) → H2(g)
B NH3(l) → NH3(g)
© UCLES
9701/01/M/J/05
B 2005
NH3(l) → NH3(g)
C 2HI(g) → H2(g) + I2(g)
C 2HI(g) → H2(g) + I2(g)
+ 4H(g)
D CH4(g) → C(g)
D CH4(g) → C(g) + 4H(g)
6
6
16)
June06/6
Which
of the following least resembles an ideal gas?
Which of the following least resembles an ideal gas?
A ammonia
A
B
ammonia
helium
B
C
helium
hydrogen
C
D
hydrogen
trichloromethane
D trichloromethane
The diagram shows part of the lattice structures of solids X and Y. [In X,
particles of different elements.]
7 The diagram shows part of the lattice structures
of solids X and Y. [In X,
4
17)
Nov07/7
particles
of different elements.]
7
7
represent
What are the lattice structures of solid diamond, iodine and silicon(IV) oxide?
giant molecular
simple molecular
A
diamond, silicon(IV) oxide
iodine
B
diamond, iodine
silicon(IV) oxide
C
iodine
diamond, silicon(IV) oxide
D
8
represent
silicon(IV) oxide X
diamond, iodine
Y
What are the types of bonding present
in X and Y?
X
Y
Which equation represents the standard enthalpy change of atomisation of bromine?
X
Y
What
the types
of bonding present
in X and Y?
A Brare
2(l) → 2Br(g)
covalent
metallic
A
X
Y
B Br2(g) → 2Br(g)
B
ionic
covalent
A
covalent
metallic
metallic
C C 1 Br2(l) →ionic
Br(g)
52
D
csonn_topical_MCQs
18) Nov06/6
6
For an ideal gas, the plot of pV against p is a straight line. For a real gas, such a plot shows a
deviation from ideal behaviour. The plots of pV against p for three real gases are shown below.
The gases represented are ammonia, hydrogen and nitrogen.
X
pV
Z
Y
ideal gas
11
Section B
For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.
0
0
p
Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements
thatidentities
you consider
be correct).
What are the
of thetogases
X, Y and Z?
The responses A to D should be selected on the basis of
X
Y
Z
A
ammonia
A
B
hydrogen
1, 2 and 3
are
C
nitrogen
correct
D
nitrogen
nitrogen
B
hydrogen
nitrogen
1 and 2
only are
ammonia
correct
hydrogen
ammonia
C
D
1 only
is
correct
2 and 3
hydrogen only are
correct
ammonia
No other combination of statements is used as a correct response.
19) Nov07/31, Nov11.12/33
31 What are assumptions of the kinetic theory of gases and hence of the ideal gas equation,
© UCLES 2006
9701/01/O/N/06
[Turn over
PV = nRT ?
1
Molecules move without interacting with one another except for collisions.
2
Intermolecular forces are negligible.
3
Intermolecular distances are much greater than the molecular size.
4
32 20)
Carbon
monoxide burns readily in oxygen to form carbon dioxide.
June08/6
6
The density of ice is 1.00 g cm–3.
What can be deduced from this information?
What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a
1 The +4 oxidation state of carbon is more stable than the +2 state.
pressure of one atmosphere (101 kPa)?
2 The standard enthalpy change of formation of carbon dioxide is more negative than that of
[1 mol
of a gas
occupies 24.0 dm3 at 25 °C (298 K) and one atmosphere.]
carbon
monoxide.
3A
7
8
3
3
The
value
the
2CO(g)
+ Odm
0.267
dm3 of theBequilibrium
1.33 dm3constant
C for
2.67
dmreaction,
D 48.0
2(g)
be high.
2CO2(g), is likely to
Which pair of elements have bonds of the same type between their atoms in the solid state?
A
aluminium and phosphorus
B
chlorine and argon
C
magnesium and silicon
D
sulphur and chlorine
Which diagram correctly describes the behaviour of a fixed mass of an ideal gas? (T is measured
in K.)
53
A
B
C
D
6
C
enthalpy changes of formation
A
aluminium and phosphorus
D
enthalpy changes of vaporisation
B
chlorine and argon
csonn_topical_MCQs
number
of
number of
C magnesium
and silicon
A substance commonly found in the house or garden
has the following properties.
unpaired
unpaired
D sulphur and chlorine
electrons
electrons
• It is combustible.
21) June08/8
8
Which diagram
correctly
describes
the behaviour of a fixed mass of an ideal gas? (T is measured
• It is an
electrical
insulator.
in K.)
• It melts over a range of temperature.
A
B
0
13 substance
14 15 be?
16 17 18
What could the
constant T
constant T
12
proton number
A brass
pV
p
B
paper
D
silicon(IV) oxide
C 0
constant T
pV
Section B
D
13
14
15 16 17
constant p
proton number
18
V
C
D
For each
of the questions in this
1 to 3 may
C0 poly(ethene)
0 section, one or more 0of the three numbered statements
0
0
0
0
0
be correct.
V
V
T
p
Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
9 22)
For Nov08/7
which
the enthalpy
change correspond
the
statements
that you does
consider
to be correct).
number
of equation
numbertoofthe enthalpy change of atomisation
of
iodine?
unpaired
7 unpaired
Which of the following would behave most like an
ideal gas at room temperature?
The electrons
responses A to D should be selected on the basis electrons
of
A ½ I2(s) → I(s)
A
carbon dioxide
B
½ I2(s)A→ I(g)
B
helium
C
I21,
(g)2→
2I(g)
and
3
B
14
C
D
1 and 2
1 only
Section 2Band 3
hydrogen
only are
only are
is
D I2(s) are
→
2I(g)
0
0
correct
correct
correct
correct
D nitrogen
For each
of the questions
this section,
or more of the three numbered
to 3 18
may
13 14 in 15
16 17one 18
13 14 statements
15 16 117
be correct.
proton number
proton number
C
No other combination of statements is used as a correct response.
Decide
whether
each of
or is not
correct
(you It
may
helpfulbytoheating
put a tick
against
, is used inismetal
priming
paints.
canfind
beitmade
PbO
in air.
8
Red
lead oxide,
Pbthe
23)
June09/5
3O4statements
the statements that you consider to be correct).
5 Which statement explains why the boiling point of methane is higher than that of neon?
12
(g)12→the
2Pbrelative
+ O2is
3O4(s) molecular mass of a particular
Cthe
atom
31
the be
mass
of6PbO(s)
a on
1; C,Ain
12;
20]
[Ar: aH,scale
The On
responses
towhich
DNe,
should
selected
basis of
sample of chlorine is 72.
Which
two values
are needed
the enthalpy
changeoffor
this reaction?
A A molecule
of methane
hastoa calculate
greater mass
than a molecule
neon.
A
C
D
Which properties
of the atoms B
in this sample are always
the same?
B Molecules
of methane
form hydrogen
bonds,
those change
of neon do
not.
A
enthalpy change
of combustion
of lead
and but
enthalpy
of formation
of Pb3O4
1,
2
and
3
1
and
2
2
and
3
1
only
1 radius
C Molecules
of methane
haveare
stronger
intermolecular
than of
those
are change
only
onlyenthalpy
are forces
is of neon.
B
enthalpy
of combustion
of PbO
and
change
formation
of Pb3O4
correct
correct
correct
correct
2 nucleon number
D The
molecule
of methane
is polar,
but that
neon is change
not.
C
enthalpy
change
of formation
of PbO
andofenthalpy
of atomisation of O2
© UCLES
9701/01/M/J/08
3 2008
isotopic mass
No other
combination
of statements
is used
as a correct
response.
D enthalpy
change
of formation
of PbO
and enthalpy
change of formation of Pb O
24) June09/32
3
4
32 An ideal gas obeys the gas laws under all conditions of temperature and pressure.
31 A monomer undergoes addition polymerisation. A 1 mol sample of the monomer is completely
polymerised.
Which of the following are true for an ideal gas?
HowThe
many
moles ofhave
polymer
might, volume.
theoretically, be formed?
1
molecules
negligible
© UCLES 2009
1
2
© UCLES 2008–6
2
3
3
9701/01/M/J/09
[Turn over
1
There
are no forces of attraction between molecules.
9701/01/O/N/08
[Turn over
10 molecules have an average kinetic energy which is proportional to its absolute
The
1
temperature.
6.02 × 1023
33 25)
For Nov09.11/32
which reactions does the value of ∆Ho represent both a standard enthalpy change of
andproperties
a standard
enthalpy
change ofbonding
formation?
32 combustion
Which physical
are
due to hydrogen
between water molecules?
1
→ CO2boiling
(g)
C(s)
O2(g)
Water+ has
a higher
point than H2S.
2
→ 2CO(g)
2C(s)
+ Oon
Ice floats
water.
2(g)
3
The H−O−H
angle
in water is approximately 104°.
CO2(g)
CO(g)
+ 21 Obond
2(g) →
33 Which equilibria, in which all species are gaseous, would have equilibrium constants, Kp, with no
units?
1
sulfur dioxide and oxygen in equilibrium with sulfur trioxide
2
hydrogen and iodine in equilibrium with hydrogen iodide
© UCLES 2009
3
9701/01/M/J/09
carbon monoxide and steam in equilibrium with carbon dioxide and hydrogen
54
A
Fr
Ra
Rn
B
Fr
Rn
Ra
Fr
Rn
Ra
Fr
C
Ra
csonn_topical_MCQs
D
Rn
26) June10.11/3
3
Which gas closely approaches ideal behaviour at room temperature and pressure?
A
ammonia
B
carbon dioxide
C
helium
D
oxygen
3
27) Nov10.12/3
3
The table gives the radii, in pm, of some ions. [1 pm = 10–12 m]
ion
radii
Na+
102
Mg2+
72
+
Cs
167
Cl –
181
2–
O
140
Caesium chloride, CsCl, has a different lattice structure from both sodium chloride, NaCl, and
magnesium oxide, MgO.
© UCLES 2010
9701/11/M/J/10
CsC lattice
NaC and MgO lattice
Which factor appears to determine the type of lattice for these three compounds?
A
the charge on the cation
B
the ratio of the ionic charges
C
the ratio of the ionic radii
D
the sum of the ionic charges
5
28) Nov10.12/7 - similar to question (1)
7
Flask X contains 5 dm3 of helium at 12 kPa pressure and flask Y contains 10 dm3 of neon at 6 kPa
pressure.
If the flasks are connected at constant temperature, what is the final pressure?
A
8
8 kPa
B
9 kPa
C
10 kPa
D
11 kPa
Use of the Data Booklet is relevant to this question.
The enthalpy change of formation, ∆Hf, of hydrated calcium ions is the enthalpy change of the
following reaction.
Ca(s) + aq – 2e– → Ca2+(aq)
The following enthalpy changes are not quoted in the Data Booklet.
Ca(s) → Ca(g)
Ca2+(g) + aq → Ca2+(aq)
∆Ha = 177 kJ mol–1
∆Hhyd = –1565 kJ mol–1
55
−(100 x 4.2 x 17)
−(100 x 4.2 x 17) J mol −−1 1
J mol
(0.050 x 2.5)
(0.050 x 2.5)
csonn_topical_MCQs
−(100 x 4.2 x 17)
1
D
−(100 x 4.2 x 17) J mol −− 1
D
J mol
(50 x 2.5)
(50 x 2.5)
C
C
29) June11.11/10
10 Three substances, R, S and T, have physical properties as shown.
10 Three substances, R, S and T, have physical properties as shown.
substance
R
S
T
substance
R
S
T
13
mp / oC
801
2852
3550
mp o/ oC
801
2852
3550
bp / C
1413 B
3600
4827
Section
bp / oC
1413
3600
4827
electrical conductivity of solid
poor
poor
good
For each of theelectrical
questions
in this section,
one or more
statements 1 to 3 may
conductivity
of solid
poor of the three
poornumberedgood
be correct.
What could be the identities of R, S and T ?
What could be the identities of R, S and T ?
Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
12
R you consider
S to be correct).
T
the statements that
R
S
T
A
MgO
NaCl
CSection
[graphite]
B
The responses A to D should be selected on the basis
of
A
MgO
NaCl
C [graphite]
B
MgO
NaCl
SiO
2
For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
B
NaClB
SiO2
AMgO
C
D
be correct.
C
NaCl
MgO
C [graphite]
Cwhether
NaCl
MgO
[graphite]2(you
1, 2 and
3 of the statements
1 andis2or isCnot
and may
3 find it helpful1toonly
DecideD
each
put a tick against
NaCl
MgO
SiOcorrect
2
the statementsare
that you consider toonly
be correct).
are
only
are
is
D
NaCl
MgO
SiO2
correct
correct
correct
correct
The responses A to D should be selected on the basis of
11 30)
In which
change
would
only
van
der
Waals’
forces
have
to
be
overcome?
June11.11/11
11 other
In which
change would
only van is
der
Waals’
have
to be overcome?
No
combination
of statements
used
as aforces
correct
response.
A
D
A evaporation
of ethanol B
C2H5OH(l) →CC2H5OH(g)
→ 3C2H5OH(g)
A melting
evaporation
2H5OH(l)
1, 2 andof3iceof ethanol1 and 2
2 and
1 only
B
HC
2O(s) → H2O(l)
31 Which statements
are correct
in terms of the only
Brønsted-Lowry
theoryisof acids and bases?
are
only are
are
→CO
H2O(l)
B melting
melting
of solid
ice carbon correct
H2O(s)
correct
correct
C
of
dioxide CO
2(s) →correct
2(l)
1 Water can act as either an acid or a base.
C solidification
melting of solid
carbon dioxide CCO
2(s) → CO2(l)
D
of butane
4H10(l) → C4H10(s)
No other
combination
is not
usedbehave
as a correct
as anresponse.
acid when dissolved in ethanol, C2H5OH.
2 Sulfuric
acid,ofHstatements
2SO4, does
D solidification of butane
C4H10(l) → C4H10(s)
3 The ammonium ion acts as a base when dissolved in liquid ammonia.
31 Solid calcium carbonate is added to 100 cm3 of dilute hydrochloric acid and the rate of the
31)
June11.11/32
reaction
is measured. 100 cm3 of distilled water is then added to a second 100 cm3 portion of the
acid,
and
thefeatures
experiment
repeated
under
the
samecopper?
conditions.
© UCLES
2011
9701/11/M/J/11
[Turn over
32
Which
are
of the
structure
of metallic
© UCLES
Why2011
does
[Turn over
1
the of
addition
rate of the reaction?
a lattice
ions of water decrease the9701/11/M/J/11
12
Adding
water electrons
reduces the frequency of collisions between reactant molecules.
delocalised
23
Adding
water reduces the proportion of effective collisions between reactant molecules.
ionic bonds
3
Adding water reduces the proportion of reactant molecules possessing the activation energy.
UseJune11.12/32
of the Data Booklet is relevant to this question.
33 32)
32 When a sample of a gas is compressed at constant temperature from 1500 kPa to 6000 kPa, its
20.5
cm3.
volume
changes
76.0 cm3 to
Zinc reacts
withfrom
hydrochloric
acid
according
to the following equation.
Which statements are possible explanations
for this
behaviour?
+H
Zn + 2HCl
→ ZnCl
2
1
2
The gas behaves non-ideally.
Which statements are correct?
2
The gas partially liquefies.
[All volumes are measured at room conditions.]
3
Gas is adsorbed on to the vessel walls.
1
A 3.27 g sample of zinc reacts with an excess of hydrochloric acid to give 0.050 mol of zinc
chloride.
33 Which equations apply to an ideal gas?
–3
[p
pressure,
V = volume,
M reacts
= molarcompletely
mass, ρ = with
density,
c = concentration,
R =mol
gasdm
constant,
of zinc
exactly
100 cm3 of 1.00
hydrochloric
2 =A
6.54 g sample
T = temperature]
acid.
13
ρRT
cRT of hydrochloric acid to give 9.60 dm3 of
reacts with
an =excess
2 of
pV zinc
= MRT
3 pV
pA= 13.08 g sample
M
M
hydrogen.
56
Which statements are possible explanations for this behaviour?
1
The gas behaves non-ideally.
csonn_topical_MCQs
2 The gas partially liquefies.
3
Gas is adsorbed on to the vessel walls.
33) June11.12/33
33 Which equations apply to an ideal gas?
[p = pressure, V = volume, M = molar mass, ρ2 = density, c = concentration, R = gas constant,
T = temperature]
Section A
ρRT
2 pV = MRT
3 pV = cRT
1 p=
M
For each question
there are four possible answers, A, B,M
C, and D. Choose the one you consider to
be correct.
34) Nov11.11/1
1
Three elements, X, Y and Z, have the physical properties shown in the table.
element
melting point
/ °C
X
–7
© UCLES 2011
boiling point
/ °C
9701/12/M/J/11
3
density
/ g cm-3
59
3.12
Y
98
883
0.97
Methyl isocyanate, CH3NCO, is a toxic liquid which is used in the manufacture of some
Z
649
1107
1.74
pesticides.
4
In
the methyl
molecule,
the sequence
of atoms is H3C — N
What
could beisocyanate
the identities
of X, Y and
Z?
C
O.
What is theXapproximate
the bonds formed by the N atom?
Y angle between
Z
AA
B
N
C
H3C
D
C
Br2
Al
Br2
O
I2
Na
BSi
N
Mg
Si
I2
O
N
D
C
O
H 3C
H3C
104
2
Mg
C
Na
C
H 3C
N
O
C
K
109
120
180
Use
of the Data Booklet is relevant to this question.
35)
Nov11.11/5
3
4+ an ideal gas.
At
room temperature
pressure
chlorine
not behave
ions are reduced to Pb2+ ions in
Lead(IV)
chloride will and
oxidise
bromide
ions todoes
bromine.
The Pbas
this conversions
reaction.
Two
are outlined below.
At which
temperature
and pressure would the behaviour of chlorine become more ideal?
+
If 6.980 g of lead(IV)
chloride
is added to an excess of sodium bromide solution, what mass of
NH4 → NH3
temperature
brominepressure
would be produced?
/ kPa
C2H4 → C2H/6K
B 1.598 g
C 3.196 g
D 6.392 g
A 0.799 g
A similar 50
200 two conversions have?
What
feature do these
5
5
B a lone pair
50 electrons
400
AWhich
in the
product
elementofhas
an equal
number
of electron pairs and of unpaired electrons within orbitals of
principal
quantum
number
2?
C
200
200
B change in oxidation state of an element
3
200in bond angle
400
beryllium
CAD decrease
of the species involved
carbon
DB disappearance
of a π bond
6
The
standard
C June12.11/6
nitrogen enthalpy change for the reaction
36)
6
Use
the Data Booklet is relevant to this question.
D of
oxygen
2NF3(g) → 2N(g) + 6F(g)
is ∆H o = +1668 kJ
The gas laws can be summarised in the ideal gas equation.
What is the bond energy of the N–F bond?
A
pV = nRT
–556 kJ mol–1
–1 is contained in a vessel at a pressure of 102 kPa and a temperature of 30 °C.
of ethene
0.56
B g
–278
kJ molgas
What
is thekJvolume
C +278
mol–1 of the vessel?
3
–1
cm kJ mol
A
49
D 2011
+556
© UCLES
7
B
494 cm3
C9701/11/O/N/11
48 900 cm3
D
494 000 cm3
Propanone has the molecular formula C3H6O.
The enthalpy change of combustion of hydrogen is –286 kJ mol–1.
The enthalpy change of combustion of carbon is –394 kJ mol–1.
The enthalpy change of combustion of propanone is –1786 kJ mol–1.
57
induced dipoles and permanent
induced dipoles only
C Bdecrease in bond
angle of the species involved
dipoles
induced dipoles and permanent
dipoles
D Cdisappearance
ofdipoles
a π bond
induced
only
csonn_topical_MCQs
6
D
induced dipoles only
induced dipoles only
Use of the Data Booklet is relevant to this question.
37) Nov11.12/6
6
The
gascompounds
laws can be
summarised
in the
ideal gas
equation.
Three
have
the physical
properties
shown
in the table.
pV = nRT
P
compound
Q
R
is contained
at a pressure993
of 102 kPa and
0.56 g of ethene gas
melting
point / °C in a vessel
2852
–119a temperature of 30 °C.
boiling
point
/ °C
What is the volume
of the
vessel?
A
7
3600
conductivity
B 494(solid)
cm3
conductivity (liquid)
49 cm3
1695
39
Cpoor
48 900 cm3 poor D
good
good
conductivity
(aqueous)
H6O.
Propanone has
the molecular
formula C3insoluble
poorcm3
494 000
poor
good
insoluble
The enthalpy change of combustion of hydrogen is –286 kJ mol–1.
What
might be
the identities
of P, Q and
R?
The
enthalpy
change
of combustion
of carbon
is –394 kJ mol–1.
The enthalpy change of combustion of propanone is –1786 kJ mol–1.
P
Q
R
Using this information, what is the enthalpy change of formation of propanone?
A
MgO
KCl
NH3
kJ mol–1
A B–1106MgO
NaF
C2H5Br
KCl
C2H5Br 11
–1
B C–540 kJ
mol
SiO
2
–1
mol
C D–254 kJ
SiO
2
NaF
HCl Section B
–1
D
+1106 kJ mol
For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be
2SO3(g), what will change the value of Kp?
7 correct.
ForJune12.11/8
the equilibrium 2SO2(g) + O2(g)
38)
8Decide
Under
which
conditions
is a
likely (you
to behave
ideally?
each
ofofthe
statements
is gas
or is most
not correct
may find
it helpful to put a tick against
A whether
adding
aset
catalyst
the statements that you consider to be correct).
B
adding
more O2
temperature
pressure
The responses A to D should be selected on the basis of
C
increasing the pressure
A
high
high
A
B
DB increasing
the temperature low
high
1, 2 and 3
8
1 and 2
C
D
2 and 3
1 only
C
are low
only arehigh
only are
is
Whichcorrect
pollutant, present in
the exhaust fumes
of an internal combustion
correct
correct
correct engine, has an element
low state and an odd
low number of electrons in one molecule of the pollutant?
inDthe +2 oxidation
No other
of statements
correct
NOresponse.
A combination
CO
B H2S is used as a C
39) June12.11/31
© UCLES 2012
© UCLES 2011
D
NO2
9701/11/M/J/12
9701/12/O/N/11
[Turn over
[Turn over
31 The gas laws can be summarised in the ideal gas equation.
pV = nRT
where each symbol has its usual meaning.
Which statements are correct?
1
One mole of an ideal gas occupies the same volume under the same conditions of
temperature and pressure.
2
The density of an ideal gas at constant pressure is inversely proportional to the temperature,
T.
3
The volume of a given mass of an ideal gas is doubled if its temperature is raised from 25 °C
to 50 °C at constant pressure.
32 Use of the Data Booklet is relevant to this question.
In which pairs do both species have the same number of unpaired p electrons?
1
O and Cl +
2
F+ and Ga–
+
58
A
A
iodine
655
B
silicon dioxide
B
835
5 csonn_topical_MCQs
table below,
CIn the
sodium
chloride
C
1310
D
1670
30
energy
/ kJ mol–1
‘+’ means that this type of standard enthalpy
D • zinc
50 change can only have positive values,
40)• June12.12/6
‘–’ means that this type of standard enthalpy change can only have negative values,
6
Use
Data Booklet
is relevant
question.
–’ means
that either
positiveto
orthis
negative
values are possible.
• of
‘+ /the
extent of reaction
The
gasrow
laws
can be summarised in the ideal gas equation.
Which
is correct?
Which statement is correct?
atomisation
pV = nRT
solution
formation
A The activation energy of the reverse reaction is +80 kJ mol–1. 3
in a glass+vessel
of volume 7000 cm at a temperature of 30 °C.
0.96
A g of oxygen
+ gas is contained
+
/–
B The enthalpy change for the forward reaction is +30 kJ mol–1.
B is the pressure
+
+/–
+/–
What
in the vessel?
C The enthalpy change for the forward reaction is +50 kJ mol–1.
/–
B 2.1+kPa
C –10.8 kPa
D 21.6 kPa
A C1.1 kPa –
kJ
mol–1.
D D The enthalpy
change
for
the
reverse
reaction
is
+30
–
–
+
7
86
TwoNov12.11/6
moles of compound
41)
P were placed in a vessel. The vessel was heated and compound P
was
partly
decomposed
to
producetoreaction
Qthis
andquestion.
R.increase
A dynamic
equilibrium
between
chemicals P,
and
Why
does
the
rate
of
a
gaseous
when
the pressure
is increased
at Q
a constant
Use of the Data Booklet is relevant
R
was established.
temperature?
of
The volume of a sample of ammonia is measured at a temperature of 60 °C and a pressure
–3 the
At
x moles
of Renergy
wereispresent
and
total
number of
moles present was (2 + x ).
A equilibrium
MoreThe
particles
have
that exceeds
activation
energy.
kPa.
volume
measured
5.37
× 10
m3. the
103
2
B The
particles
have
more
space
in reaction?
which
to move.
What
for sample
this
equilibrium
What is
is the
the equation
mass of the
of ammonia,
given to two significant figures?
C PThe particles
faster.
AA
2Qg+ R move
B 0.0034 g
0.00019
C
2 g
0.19
D
3.4 g
There 2Q
are+more
BD 2P
R frequent collisions between particles.
Section A
7 42)
Aluminium
is +
extracted
by the electrolysis of a molten mixture containing aluminium oxide. By a
June13.11/9
C
2P
Q
R
similar
method,
magnesium
is extracted
by the
electrolysis
a molten
mixture
containingto
For each
question
there
are four possible
answers,
A, B,
C, and D. of
Choose
the one
you consider
9 magnesium
Which would
behave the least like an ideal gas at room temperature?
be correct.
D 2P
Qchloride.
+ 2R
1
A carbon
dioxide
Which
statement
about the extraction of magnesium is correct?
Which
diagram
shows
the correct graph of V against p for a fixed mass of an ideal gas at
B Magnesium
helium
A
ions travel to the anode and are
2 oxidised to magnesium metal.
constant
temperature?
C
B
hydrogen ions travel to the anode and are reduced to magnesium metal.
Magnesium
9701/12/M/J/12
Section A
A
B
C
D [Turn over
D Magnesium
nitrogen ions travel to the cathode and are oxidised to magnesium metal.
C
For each question there are four possible answers, A, B, C, and D. Choose the one you consider to
D Magnesium ions travel to the cathode and are reduced to magnesium metal.
be correct.
V
V can be used to calculate
V
V
10 43)
TheNov12.13/1
general gas equation
the Mr value of a gas.
© UCLES 2012
1
Which diagram shows the correct graph of V against p for a fixed mass of an ideal gas at
0constant temperature? 0
0
0
p
p
0
02012 pmpV
0pV p [Turn over
© UCLES
pVRT 9701/11/O/N/120 mRT
A Mr = A
B Mr = B
C Mr =
D
M
=
r
C
D
For a sample of a gas of mass m g, which expression will give the value of Mr?
RT
2
m
mRT
pV
Which statement can be explained by intermolecular hydrogen bonding?
AV Butane has a higher boiling
point than propane.
V
V
V
B Hydrogen bromide forms an acidic solution when dissolved in water.
0
0
0
0
p a higher boiling
p
C 0SiH4 has
0 point pthan CH4.
0
0
D
Water has a higher boiling point than CH4.
© UCLES 2013
2
3
p
9701/11/M/J/13
44)
Nov12.13/3
Which
statement can be explained by intermolecular hydrogen bonding?
Use
the Data
relevant
to this
A of
Butane
hasBooklet
a higherisboiling
point
thanquestion.
propane.
The
of abromide
sampleforms
of ammonia
was
measured
a temperature
of 40 °C and a pressure of
B volume
Hydrogen
an acidic
solution
whenatdissolved
in water.
95 kPa. The volume measured was 4.32 × 10–5 m3.
C SiH4 has a higher boiling point than CH4.
What
is the has
mass
of the sample
of ammonia?
D Water
a higher
boiling point
than CH4.
A
3
4
2.7 × 10–5 g
B
2.1 × 10–4 g
C
2.7 × 10–2 g
D
2.1 × 10–1 g
Use of the Data Booklet is relevant to this question.
Aluminium
is of
extracted
by of
theammonia
electrolysis
a molten at
mixture
containingofaluminium
a pressure of
The volume
a sample
wasofmeasured
a temperature
40 °C and oxide.
–5
3
95 kPa. The volume measured was 4.32 × 10 m .
By a similar method, magnesium is extracted by the electrolysis of a molten mixture containing59
magnesium
What is the chloride.
mass of the sample of ammonia?
Which
statement
B this
2.1electrolysis
× 10–4 g isCcorrect?
2.7 × 10–2 g
A 2.7
× 10–5 g about
D
2.1 × 10–1 g
particles?
B
The particles have
A more space in which to move.
1 neutrons
C
The particles move faster.
csonn_topical_MCQs
B
2 electrons
D
There are more frequent
collisions between particles.
3
9
protons
45)
Nov12.13/33
Which
would behave the least like an ideal gas at room temperature?
33 Which substances have a giant structure?
6
A
carbon dioxide
1
calcium oxide
B
helium
2
calcium
C
3
baked clay found in crockery
C D
D
nitrogen
hydrogen
46)
June13.11/10
Which
pair of elements
has chemical bonds of the same type between their atoms in the solid
state?
10 The general gas equation can be used to calculate the Mr value of a gas.
A
aluminium and phosphorus
For a sample of a gas of mass m g, which expression will give the value of Mr?
B
chlorine and argon
A
C
mpV
pVRT
M
B Mr =
r =
magnesium
and
silicon
RT
m
D
sulfur and chlorine
C
Mr =
mRT
pV
D
Mr =
pV
mRT
47) June13.12/7
Ethanol has a boiling point of 78 °C. At 101 kPa and 79 °C ethanol vapour does not perfectly obey
9701/13/O/N/12
[Turn over
the gas equation pV = nRT.
7
© UCLES 2012
4
What is the reason for this?
Which
least vapour
resembles
ideal gas with
at room
temperature
and
pressure?
©6UCLES
2013
9701/11/M/J/13
°C.
A
Ethanol
is inan
equilibrium
ethanol
liquid at 79
A
B
ammonia
There
are intermolecular forces between the molecules of ethanol vapour.
B
C
helium
The
vapourisation of ethanol liquid is an endothermic process.
C
D
hydrogenwill not obey the gas equation perfectly at such a low pressure.
Vapours
D
methane
48) June13.13/7
7
Use of the Data Booklet is relevant to this question.
When 0.15 g of an organic compound is vaporised, it occupies a volume of 65.0 cm3 at 405 K and
1.00 × 105 Nm–2.
Using the expression pV = nRT, which of the following expressions should be used to calculate
the relative molecular mass, Mr, of the compound?
0.15 × 65 × 10 − 6 × 1× 105
8.31× 405
A 2013
© UCLES
8
9
B
0.15 × 8.31× 405
1× 105 × 65 × 10 − 3
C
0.15 × 65 × 10 − 3 × 1× 105
8.31× 405
D
0.15 × 8.31× 405
1× 105 × 65 × 10 − 6
[Turn over
9701/12/M/J/13
Which compound is the only gas at room temperature and pressure?
A
CH3CH2CH2NH2
Mr = 59.0
B
CH3CH2CH2OH
Mr = 60.0
C
CH2OHCH2OH
Mr = 62.0
D
CH3CH2Cl
Mr = 64.5
Which formula represents the empirical formula of a compound?
A
CH4O
B
C 2H 4
C
C6H12
D
60
H 2O2