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WorksheetsAQA AS Chemistry, paper 1 MCQ practice
Total questions: 49
Worksheet time: 12hrs 15mins
Which of these elements has the second highest ionisation energy?
Na
Mg
Ne
Ar
Which of these has the highest first ionisation energy?
Na
Al
Si
Cl
What is element X?
Nitrogen
Phosphorous
Aluminium
Boron
Chlorine exists as two isotopes 35-Cl and 37-Cl in the ratio 3:1
Which statement about peaks in the mass spectrum of Cl2 is correct?
Peaks at m/z = 70 and 74 in the ratio 3:1
Peaks at m/z = 70, 72 and 74 in the ratio 9:6:1
Peaks at m/z = 70, 72 and 74 in the ratio 9:3:1
Peaks at m/z = 70 and 72 in the ratio 3:1
Which of these has the smallest number of neutrons?
3 H
4 He
5 He
4 Li
Which statement about time of flight mass spectrometry is correct?
The current in the detector is proportional to the ion abundance
Sample particles gain electrons to form positive ions
Particles are detected in the order of their kinetic energies
Ions are accelerated by a magnetic field
Which element is in the d-block of the Periodic Table?
Selenium
Antimony
Tantalum
Lead
What volume of water should the student add?
45.0cm3
95.0cm3
100cm3
995cm3
What mass of nitrogen was present in the sample?
0.041g
0.057g
0.074g
0.420g
Which of these samples of gas contains the largest number of molecules?
The gas constant R = 8.31 J K-1 mol-1
5.0 x 10-4 m3 at 1.0 x 106 Pa and 300K
4.0 x 10-3 m3 at 2.0 x 105 Pa and 400K
3.0 x 10-1 m3 at 3.0 x 104 Pa and 500K
2.0 x 10-2 m3 at 4.0 x 103 Pa and 600K
Which sample contains the most molecules?
The Avogadro constant L = 6.022 x 1023 mol-1
2.10 x 1022 molecules of methane, CH4
1.0 g of oxygen, O2
65.0 mg of hydrogen, H2
0.0300 mol of ethane, C2H6
10 cm3
25 cm3
50 cm3
100 cm3
9.0 x 10-3
3.6 x 10-2
1.08 x 10-2
2.16 x 10-2
Which of the following solutions would react exactly with a solution containing 0.0500 mol sulphuric acid?
50.0 cm2 of 1.00 mol dm-3 NaOH
100.0 cm2 of 2.00 mol dm-3 NaOH
100.0 cm2 of 2.00 mol dm-3 Ba(OH)2
50.0 cm2 of 1.00 mol dm-3 Ba(OH)2
Barium
Calcium
Magnesium
Strontium
There are 392 mol of pure gold in a bar measuring 10cm x 10cm x 40cm.
What is the density of the gold in Kg dm-3 ?
193
19.3
1.93
0.193
What is the empirical formula of an oxide of nitrogen that contains 26% nitrogen by mass?
NO2
N2O3
N2O5
N4O5
Which compound forms a molecular ion with a different precise molecular mass from the other three?
butanone
cyclobutanol
dimethylpropane
methylpropanal
3.88 x 10-3 mol dm-3
7.76 x 10-3 mol dm-3
3.88 x 10-2 mol dm-3
7.76 x 10-2 mol dm-3
2.75
5.49
2.75 x 103
5.49 x 103
MBr
MBr2
MBr3
MBr4
0.35
0.46
0.54
0.65
2.41 x 1024
1.93 x 1024
1.81 x 1024
9.63 x 1023
CH2Cl2
HBr
Kr
PF3
50 cm3
40 cm3
30 cm3
20 cm3
33%
50%
67%
75%
0.0341
0.137
0.163
0.273
4.476 x 10-2 dm3
4.48 x 10-2 dm3
4.50 x 10-2 dm3
44.8 x 10-3 dm3
294 kPa
68.0 kPa
34.0 kPa
13.7 kPa
Which of the following contains the most chloride ions?
10 cm3 of 3.30 x 10-2 mol dm-3 aluminium chloride solution
20 cm3 of 5.00 x 10-2 mol dm-3 calcium chloride solution
30 cm3 of 3.30 x 10-2 mol dm-3 hydrochloric acid solution
40 cm3 of 2.50 x 10-2 mol dm-3 sodium chloride solution
0.09%
0.11%
0.18%
0.22%
Which molecule has the largest dipole?
ClF3
BF3
SF6
CF4
Which substance exists as a macromolecule?
Cu
SiO2
P4O10
MgO
Which is the most likely bond angle around the oxygen atom in ethanol?
104.5ο
109.5ο
120ο
180ο
Which of these substances has permenent dipole-dipole attractions between molecules?
CCl4
C2F4
(CH3)2CO
CO2
Why are fluoroalkanes unreactive?
Fluorine is highly electronegative
The F- ion is very stable
They are polar molecules
The C-F bond is very strong
Which of these substances do not show hydrogen bonding?
HF
NH3
CH3COOH
CHF3
What type of bond is formed between N and B when a molecule of NH3 reacts with a molecule of BF3?
Ionic
Covalent
Co-ordinate
Van der Waals
Which species has one or more bond angle(s) of 90ₒ?
CH4
NH4+
ClF4
AlCl4-
Which compound has the highest boiling point?
C2H4
C2H6
CH3NH2
CH3F
If the total pressure is increased at constant temperature, the proportion of COCl2 in the equilibrium mixture will decrease.
Use of a catalyst will increase the proportion of COCl2 in the equilibrium mixture at constant temperature and pressure.
Reducing the equilibrium concentration of CO will increase the value of the equilibrium constant.
Raising the temperature from 373K to 473K will increase the value of the equilibrium constant.
NO2 is brown and the forward reaction is exothermic.
NO2 is brown and the forward reaction is endothermic.
NO2 is colourless and the forward reaction is exothermic.
NO2 is colourless and the forward reaction is endothermic.
0.30
0.41
1.54
2.46
1.5
2.0
2.5
3.0
14
16
18
20
Which species contains an element with the oxidation number of +4?
NO2+
ClO3-
H2SO3
PCl5
In which reaction is hydrogen acting as an oxidising agent?
Which of these is not a redox reaction?
