Given the following relative atomic masses: Cu = 64, S = 32 and O = 16; calculate the relative formula mass of copper
sulfate, CuSO4 [rfm-1]
160
112
96
336
Given the following relative atomic masses: H = 1 and C = 12; calculate the relative molecular mass of ethane, C2H6 [rfm-2]
13
30
18
25
Given the following relative atomic masses: H = 1 and C = 12; calculate the relative molecular mass of octane, C8H18 [rfm-3]
13
96
114
112
Given the following relative atomic masses: H = 1, N = 14 and O = 16; calculate the relative formula mass of nitric acid, HNO3 [rfm-4]
31
93
62
63
Given the following relative atomic masses: H = 1, N = 14 and O = 16; calculate the relative formula mass of ammonium nitrate, NH4NO3 [rfm-5]
80
31
90
180
Given the following relative atomic masses: H = 1, N = 14, O = 16 and S = 32; calculate the relative formula mass of ammonium
sulfate, (NH4)2SO4 [rfm-6]
63
132
216
100
Given the following relative atomic masses: H = 1, O = 16 and S = 32; calculate the relative formula mass of
sulfuric acid, H2SO4 [rfm-7]
49
194
98
66
Given the following relative atomic masses: O = 16, Al = 27 and S = 32; calculate the relative formula mass of aluminium
sulfate, Al2(SO4)3 [rfm-8]
75
315
171
342
Given the following relative atomic masses: H = 1 and Cl = 35.5, calculate the relative formula mass of hydrochloric acid, HCl [rfm-9]
36.5
18
35.5
37.5
Given the following relative atomic masses: Na = 23 and Cl = 35.5, calculate the relative formula mass of sodium chloride, NaCl [rfm-10]
40
58.5
49.5
35
Given the following relative atomic masses: Ca = 40 and Cl = 35.5, calculate the relative formula mass of calcium chloride, CaCl2 [rfm-11]
75.5
151
111
146.5
Given the following relative atomic masses: H = 1, O = 16 and Mg = 24, calculate the relative formula mass of magnesium hydroxide, Mg(OH)2 [rfm-12]
41
82
42
58
Given the following relative atomic masses: Al = 27 and Cl = 35.5, calculate the relative formula mass of aluminium chloride, AlCl3 [rfm-13]
133.5
62.5
187.5
98
Given the following relative atomic masses: H = 1, O = 16 and Al = 27, calculate the relative formula mass of aluminium hydroxide, Al(OH)3 [rfm-14]
44
78
132
46
Given the following relative atomic masses: H = 1, C = 12 and O = 16; calculate the relative molecular mass of glucose, C6H12O6 [rfm-5]
29
40
180
90
Given the following relative atomic masses: H = 1, C = 12 and O = 16; calculate the relative molecular mass of ethanol ('alcohol'), C2H5OH [rfm-16]
29
23
41
46
Given the following relative atomic masses: H = 1, C = 12 and O = 16; calculate the relative molecular mass of ethanoic acid ('acetic acid'), CH3COOH [rfm-17]
60
29
84
58
Given the following relative atomic masses: O = 16 and Fe = 56; calculate the relative formula mass of iron(II) oxide, FeO [rfm-18]
40
72
56
16
Given the following relative atomic masses: O = 16 and Fe = 56; calculate the relative formula mass of iron(III) oxide, Fe2O3 [rfm-19]
72
200
160
216
Given the following relative atomic masses: O = 16 and Fe = 56; calculate the relative formula mass of the iron oxide, Fe3O4 [rfm-20]
72
272
174
232
Given the following relative atomic masses: H = 1 and C = 12; calculate the relative molecular mass of methane, CH4 [rfm-21]
16
13
52
10
Given the following relative atomic masses: H = 1 and C = 12; calculate the relative molecular mass of propane, C3H8 [rfm-22]
13
44
99
40
Given the following relative atomic masses: C = 12 and O = 16; calculate the relative molecular mass of carbon dioxide, CO2 [rfm-23]
28
56
44
14
Given the following relative atomic masses: C = 12, O = 16 and Cu = 64; calculate the relative formula mass of copper carbonate, CuCO3 [rfm-24]
92
276
148
124
Given the following relative atomic masses: C = 12, O = 16 and Ca = 40; calculate the relative formula mass of calcium carbonate, CaCO3 [rfm-25]
100
68
204
124
Given the following symbol equation: 2Mg + O2 ==> 2MgO Calculate how many g of magnesium oxide is formed by burning 24g of magnesium in air. (Relative atomic masses, Ar: Mg = 24 and O = 16) [com-1]
40
16
20
80
Given the following symbol equation: 2Mg + O2 ==> 2MgO Calculate how many tonne of magnesium is needed to make 80 tonne of magnesium oxide. (Relative atomic masses, Ar: Mg = 24 and O = 16) [com-2]
96
48
24
16
Given the following symbol equation: CaCO3(s) ==> CaO(s) + CO2(g) Calculate how many kg of calcium carbonate is needed to make 56 kg of calcium oxide. (Relative atomic masses, Ar: Ca = 40, C = 12 and O = 16) [com-3]
50
44
100
40
Given the following symbol equation: CaCO3(s) ==> CaO(s) + CO2(g) Calculate how many g of carbon dioxide is formed if 25g of calcium carbonate is decomposed on heating to form 14g of calcium oxide. (Relative atomic masses, Ar: Ca = 40, C = 12 and O = 16) [com-4]
22
44
10
11
Given the symbol equation to show the formation of iron
sulfide: Fe + S ==> FeS Calculate the mass in g of iron sulfide formed when 5.6g of iron combines with 3.2g of
sulfur. (Relative atomic masses, Ar: Fe = 56 and S = 32) [com-5]
8.8
2.4
5.6
3.2
Given the symbol equation to show the formation of iron
sulfide: Fe + S ==> FeS Calculate the mass in g of iron sulfide formed when 28g of iron combines with 16g of
sulfur. (Relative atomic masses, Ar: Fe = 56 and S = 32) [com-6]
12
44
28
16
Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine: Ca(s) + Cl2(g) ==> CaCl2(s) Calculate the mass in g of calcium chloride formed when 20g of calcium combines with 35.5g of chlorine. (Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-7]
15.5
70.0
55.5
17.5
Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine: Ca(s) + Cl2(g) ==> CaCl2(s) Calculate the mass in g of chlorine needed when 40g of calcium forms 111g of calcium chloride. (Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-8]
80
100
151
71
Given the symbol equation to show the formation of aluminium
sulfide by heating a mixture of aluminium and sulfur: 2Al + 3S ==> Al2S3 How many g of
sulfur is needed if 54g of aluminium is reacted to form 150g of aluminium
sulfide? (Relative atomic masses, Ar: Al = 27 and S = 32) [com-9]
96
204
64
27
Given the symbol equation to show the formation of aluminium
sulfide by heating a mixture of aluminium and sulfur: 2Al + 3S ==> Al2S3 How many kg of
sulfur is needed if 108kg of aluminium is reacted to form 300kg of aluminium
sulfide? (Relative atomic masses, Ar: Al = 27 and S = 32) [com-10]
408
192
96
32
Given the symbol equation to show the formation of iron
sulfide by heating a mixture of iron and sulfur: Fe + S ==> FeS Calculate the mass in g of iron unreacted when 60g of iron reacts with 32g of
sulfur to form 88g of iron sulfide. (Relative atomic masses, Ar: Fe = 56 and S = 32) [com-11]
8
32
4
56
Given the symbol equation to show the formation of iron
sulfide by heating a mixture of iron and sulfur: Fe + S ==> FeS Calculate the mass in g of
sulfur unreacted when 28g of iron reacts with 22g of sulfur to form 44g of iron
sulfide. (Relative atomic masses, Ar: Fe = 56 and S = 32) [com-12]
22
16
12
6
Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine: Ca(s) + Cl2(g) ==> CaCl2(s) Calculate the mass in g of calcium left unreacted when 25g of calcium reacts with 35.5g of chlorine. (Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-13]
10.5
5.0
7.1
12.5
Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine: Ca(s) + Cl2(g) ==> CaCl2(s) Calculate the mass in g of chlorine left unreacted when 80g of calcium reacts with 150g of chlorine to form 222g of calcium chloride. (Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-14]
70
8
16
72
Given the equation: 2Mg(s) + O2(g) ==> 2MgO(s) and the atomic masses: Mg = 24, O = 16, how many g of magnesium is needed to make 10g of magnesium oxide? [rmc-1]
6.0
3.0
1.2
2.4
Given the equation: 2Mg(s) + O2(g) ==> 2MgO(s) and the atomic masses: Mg = 24, O = 16, how many tonne of magnesium oxide can be made from 3 tonne of magnesium? [rmc-2]
2.4
5.0
8.0
4.8
Given the equation: 2Mg(s) + O2(g) ==> 2MgO(s) and the atomic masses: Mg = 24, O = 16, what mass of oxygen in g, combines with 240g of magnesium? [rmc-3]
64
80
160
32
Iron
sulfide can be made by heating an iron and sulfur mixture. Fe(s) + S(s) ==> FeS(s) Given the atomic masses: Fe = 56, S = 32, how many g of iron
sulfide can be made from 14g of iron? [rmc-4]
44
28
16
22
Iron
sulfide can be made by heating an iron and sulfur mixture. Fe(s) + S(s) ==> FeS(s) Given the atomic masses: Fe = 56, S = 32, how many g of
sulfur reacts with 224g of iron? [rmc-5]
128
32
64
112
Iron
sulfide can be made by heating an iron and sulfur mixture. Fe(s) + S(s) ==> FeS(s) Given the atomic masses: Fe = 56, S = 32, how many g of iron is needed to make 440g of iron
sulfide? [rmc-6]
56
280
220
168
The iron ore Haematite consists mainly of iron(III) oxide. In a blast furnace it is reduced to iron with carbon monoxide ... Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g) Given the atomic masses: Fe = 56, O =16, C=12, how many tonne of iron can be made from 40 tonnes of haematite ore? [rmc-7]
56
14
28
7
The iron ore Haematite consists mainly of iron(III) oxide. In a blast furnace it is reduced to iron with carbon monoxide ... Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g) Given the atomic masses: Fe = 56, O =16, C=12, how many tonne of haematite ore are needed to make 224 tonne of iron? [rmc-8]
160
480
640
320
The iron ore Haematite consists mainly of iron(III) oxide. In a blast furnace it is reduced to iron with carbon monoxide ... Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g) Given the atomic masses: Fe = 56, O =16, C=12, how g of carbon monoxide are needed to reduce 32g of iron oxide to iron? [rmc-9]
16.8
33.6
8.4
28.0
The iron ore Haematite consists mainly of iron(III) oxide.In a blast furnace it is reduced to iron with carbon monoxide ... Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g) Given the atomic masses: Fe = 56, O =16, C=12, how many g of carbon dioxide are formed when 80 g of haematite is reduced to iron? [rmc-10]
44
66
33
40
Lime (calcium oxide) is made by heating limestone (calcium carbonate). CaCO3(s) ==> CaO(s) + CO2(g) Given the atomic masses: Ca = 40, C = 12, O = 16, how many tonne of limestone is needed to make 112 tonne of lime? [rmc-11]
224
400
200
300
Lime (calcium oxide) is made by heating limestone (calcium carbonate). CaCO3(s) ==> CaO(s) + CO2(g) Given the atomic masses: Ca = 40, C = 12, O = 16, what mass in g of lime is made from 20g of limestone? [rmc-12]
8.8
5.6
4.4
11.2
Lime (calcium oxide) is made by heating limestone (calcium carbonate). CaCO3(s) ==> CaO(s) + CO2(g) Given the atomic masses: Ca = 40, C = 12, O = 16, how many tonne of carbon dioxide is formed by decomposing 400 tonne of calcium carbonate? [rmc-13]
176
44
88
132
The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid. ZnCO3(s) + 2HCl(aq) ==> ZnCl2(aq) + H2O(l) + CO2(g) Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, how many g of zinc carbonate are needed to make 68g of zinc chloride?? [rmc-14]
125.0
62.5
68.0
136.0
The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid. ZnCO3(s) + 2HCl(aq) ==> ZnCl2(aq) + H2O(l) + CO2(g) Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, how many g of HCl are needed to make 408g of zinc chloride? [rmc-15]
109.5
36.5
219.0
71.0
The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid. ZnCO3(s) + 2HCl(aq) ==> ZnCl2(aq) + H2O(l) + CO2(g) Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, what mass of zinc chloride in g can be made from 25g of zinc carbonate? [rmc-16]
54.4
12.5
13.6
27.2
The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid. ZnCO3(s) + 2HCl(aq) ==> ZnCl2(aq) + H2O(l) + CO2(g) Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, how many g of water are formed when 250g of zinc carbonate reacts? [rmc-17]
36
18
9
27
The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid. ZnCO3(s) + 2HCl(aq) ==> ZnCl2(aq) + H2O(l) + CO2(g) Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, how many g of carbon dioxide are formed when 3.65g of hydrochloric acid reacts? [rmc-18]
4.4
2.2
1.1
8.8
The salt sodium
sulfate, Na2SO4, can be made by neutralising sodium hydroxide with
sulfuric acid. 2NaOH(aq) + H2SO4(aq) ==> Na2SO4(aq) + 2H2O(l) Given the atomic masses: Na = 23, O = 16, H = 1, S = 32, how many g of sodium hydroxide is needed to make 213g of sodium
sulfate? [rmc-19]
40
80
120
160
The salt sodium
sulfate, Na2SO4, can be made by neutralising sodium hydroxide with
sulfuric acid. 2NaOH(aq) + H2SO4(aq) ==> Na2SO4(aq) + 2H2O(l) Given the atomic masses: Na = 23, O = 16, H = 1, S = 32, what mass in g of
sulfuric acid is needed to make 7.1g of sodium sulfate? [rmc-20]
9.8
14.7
19.6
4.9
The salt sodium
sulfate, Na2SO4, can be made by neutralising sodium hydroxide with
sulfuric acid. 2NaOH(aq) + H2SO4(aq) ==> Na2SO4(aq) + 2H2O(l) Given the atomic masses: Na = 23, O = 16, H = 1, S = 32, how many g of sodium
sulfate is formed when 8g of sodium hydroxide reacts? [rmc-21]
14.2
28.4
7.1
21.3
The salt sodium
sulfate, Na2SO4, can be made by neutralising sodium hydroxide with
sulfuric acid. 2NaOH(aq) + H2SO4(aq) ==> Na2SO4(aq) + 2H2O(l) Given the atomic masses: Na = 23, O = 16, H = 1, S = 32, how many g of water are formed when 49g of
sulfuric acid reacts? [rmc-22]
9
18
36
23
Copper(I)
sulfide ore can be converted to copper by roasting in air: Cu2S(s) + O2(g) ==> 2Cu(s) + SO2(g) How many g of copper can be made from 320g of the copper ore? (Relative atomic masses: Cu = 64, S = 32, O = 16) [rmc-23]
128
64
256
192
Copper(I)
sulfide ore can be converted to copper by roasting in air: Cu2S(s) + O2(g) ==> 2Cu(s) + SO2(g) How many tonnes of oxygen are needed to convert 40 tonnes of ore to copper? (Relative atomic masses: Cu = 64, S = 32, O = 16) [rmc-24]
16
32
12
8
Copper(I)
sulfide ore can be converted to copper by roasting in air: Cu2S(s) + O2(g) ==> 2Cu(s) + SO2(g) How many tonnes of
sulfur dioxide are produced for every 1280 tonnes of ore processed? (Relative atomic masses: Cu = 64, S = 32, O = 16) [rmc-25]
512
128
256
64
Copper(I)
sulfide ore can be converted to copper by roasting in air: Cu2S(s) + O2(g) ==> 2Cu(s) + SO2(g) How many tonnes of ore are needed to make 25.6 tonnes of copper? (Relative atomic masses: Cu = 64, S = 32, O = 16) [rmc-26]
64
32
48
56
Aluminium chloride can be prepared by passing dry chlorine or hydrogen chloride gas over heated aluminium metal. The equation for the hydrogen chloride reaction is: 2Al(s) + 6HCl(g) ==> 2AlCl3(s) + 3H2(g) How many kg of aluminium chloride can be made from 27 kg of aluminium? (Relative atomic masses: Al = 27.0, Cl = 35.5, H = 1.0) [rmc-27]
267.0
400.5
133.5
66.75
Aluminium chloride can be prepared by passing dry chlorine or hydrogen chloride gas over heated aluminium metal. The equation for the hydrogen chloride reaction is: 2Al(s) + 6HCl(g) ==> 2AlCl3(s) + 3H2(g) How many tonnes of hydrogen would be produced by reacting 108 tonnes of aluminium? (Relative atomic masses: Al = 27.0, Cl = 35.5, H = 1.0) [rmc-28]
2
3
6
12
Aluminium chloride can be prepared by passing dry chlorine or hydrogen chloride gas over heated aluminium metal. The equation for the chlorine reaction is: 2Al(s) + 3Cl2(g) ==> 2AlCl3(s) How much aluminium is needed to make 89 g of aluminium chloride? (Relative atomic masses: Al = 27.0, Cl = 35.5, H =1) [rmc-29]
18
27
54
9
Aluminium chloride can be prepared by passing dry chlorine or hydrogen chloride gas over heated aluminium metal. The equation for the chlorine reaction is: 2Al(s) + 3Cl2(g) ==> 2AlCl3(s) How many tonne of chlorine is needed to make 1068 tonne of aluminium chloride? (Relative atomic masses: Al = 27.0, Cl = 35.5, H = 1) [rmc-30]
71
852
426
213
Yellow lead(II) oxide ore can be reduced by heating with charcoal (carbon) in a furnace to give silvery liquid lead metal: lead(II) oxide + carbon ==> lead + carbon dioxide 2PbO(s) + C(s) ==> 2Pb(l) + CO2(g) How many tonne of lead can be made from 223 tonne of ore? (Relative atomic masses: Pb = 207, O = 16, C = 12) [rmc-31]
414.0
103.5
207.0
310.5
Yellow lead(II) oxide ore can be reduced by heating with charcoal (carbon) in a furnace to give silvery liquid lead metal: lead(II) oxide + carbon ==> lead + carbon dioxide 2PbO(s) + C(s) ==> 2Pb(l) + CO2(g) How many tonne of ore is needed to make 828 tonne of lead? (Relative atomic masses: Pb = 207, O = 16, C = 12) [rmc-32]
223
446
1784
892
Yellow lead(II) oxide ore can be reduced by heating with charcoal (carbon) in a furnace to give silvery liquid lead metal: lead(II) oxide + carbon ==> lead + carbon dioxide 2PbO(s) + C(s) ==> 2Pb(l) + CO2(g) How many kg of carbon is needed to make 828 kg of lead? (Relative atomic masses: Pb = 207, O = 16, C = 12) [rmc-33]
24
12
6
48
Yellow lead(II) oxide ore can be reduced by heating with charcoal (carbon) in a furnace to give silvery liquid lead metal: lead(II) oxide + carbon ==> lead + carbon dioxide 2PbO(s) + C(s) ==> 2Pb(l) + CO2(g) How many g of carbon dioxide are formed when 207 g of lead are produced? (Relative atomic masses: Pb = 207, O = 16, C = 12) [rmc-34]
44
22
11
33
Which of the following is a chemical test for the gas hydrogen? [id-01]
pops with lit splint
turns limewater cloudy
relights a glowing splint
bleaches damp litmus paper white
Which of the following is a chemical test for the gas carbon dioxide? [id-02]
pops with a lit splint
turns limewater cloudy/milky (white precipitate)
relights a glowing splint
bleaches damp litmus paper white
Which of the following is a chemical test for the gas oxygen? [id-03]
pops with a lit splint
turns limewater cloudy
relights a glowing splint
bleaches damp litmus paper white
Which of the following is a chemical test for the gas chlorine? [id-04]
pops with a lit splint
turns limewater cloudy
relights a glowing splint
bleaches damp litmus paper white
Which gas is formed when a metal reacts with an acid? [id-05]
hydrogen, H2
carbon dioxide, CO2
oxygen, O2
chlorine, Cl2
Which gas is formed when an acid reacts with a carbonate? [id-06]
hydrogen, H2
carbon dioxide, CO2
oxygen, O2
chlorine, Cl2
A gas turns damp red litmus paper blue. The gas is? [id-07]
carbon dioxide, CO2
oxygen, O2
ammonia, NH3
sulfur dioxide, SO2
A gas turns damp orange potassium dichromate(VI) paper green. The gas is? [id-08]
carbon dioxide, CO2
oxygen, O2
ammonia, NH3
sulfur dioxide, SO2
A brown solution of a substance turns dark blue when a drop of starch solution was added. The substance is most likely to be? [id-09]
iodine, I2
chlorine, Cl2
bromine, Br2
sulfur dioxide, SO2
Which of the following descriptions describes a simple chemical test for chloride ions in a solution? [id-10]
A few drops of dilute hydrochloric acid are added to the solution followed by a few drops of barium chloride or barium nitrate solution.
A few drops of dilute nitric acid are added to the solution followed by a few drops of silver nitrate solution.
A few cm3 of dilute hydrochloric acid is added and any gas formed is tested with limewater.
A few cm3 of dilute sodium hydroxide is added and any gas formed is tested with red litmus.
A few cm3 of dilute nitric acid followed by a few drops of silver nitrate solution is added to a solution of a salt. If a white precipitate forms, which ion from the salt is most likely to be in the solution? (Extra advanced level observation: The white precipitate dissolves in ammonia solution.) [id-11]
sulfate ion, SO42-
chloride ion, Cl-
bromide ion, Br-
iodide ion, I-
A few cm3 of dilute nitric acid followed by a few drops of silver nitrate solution is added to a solution of a salt. If a cream precipitate forms, which ion from the salt is most likely to be in the solution? (Extra advanced level observation: The cream precipitate slightly dissolves in conc. ammonia solution.) [id-12]
sulfate ion, SO42-
chloride ion, Cl-
bromide ion, Br-
iodide ion, I-
A few cm3 of dilute nitric acid followed by a few drops of silver nitrate solution is added to a solution of a salt. If a pale yellow precipitate forms, which ion from the salt is most likely to be in the solution? (Extra advanced level observation: The pale yellow precipitate is insoluble with conc. ammonia solution.) [id-13]
sulfate ion, SO42-
chloride ion, Cl-
bromide ion, Br-
iodide ion, I-
Which of the following descriptions describes a simple chemical test for
sulfate ions in a solution? [id-14]
A few drops of dilute hydrochloric acid are added to the solution followed by a few drops of barium chloride or barium nitrate solution.
A few drops of dilute nitric acid are added to the solution followed by a few drops of silver nitrate solution.
A few cm3 of dilute hydrochloric acid is added and any gas formed is tested with limewater.
A few cm3 of dilute sodium hydroxide is added, the mixture gently warmed and any gas formed is tested with red litmus.
Which of the following descriptions describes a simple chemical test for carbonate ions in a solution? [id-15]
A few drops of dilute hydrochloric acid are added to the solution followed by a few drops of barium chloride or barium nitrate solution.
A few drops of dilute nitric acid are added to the solution followed by a few drops of silver nitrate solution.
A few cm3 of dilute hydrochloric acid is added and any gas formed is tested with limewater.
A few cm3 of dilute sodium hydroxide is added, the mixture gently warmed and any gas formed is tested with red litmus.
Which of the following descriptions describes a simple chemical test for ammonium ions in a solution? [id-16]
A few drops of dilute hydrochloric acid are added to the solution followed by a few drops of barium chloride or barium nitrate solution.
A few drops of dilute nitric acid are added to the solution followed by a few drops of silver nitrate solution.
A few cm3 of dilute hydrochloric acid is added and any gas formed is tested with limewater.
A few cm3 of dilute sodium hydroxide is added, the mixture gently warmed and any gas formed is tested with red litmus.
A few drops of sodium hydroxide solution was added to a metal salt solution. A dark green gelatinous precipitate was formed. Which metal ion (cation) was present in the salt solution? [id-17]
iron(II) ion, Fe2+
iron(III) ion, Fe3+
copper(II) ion, Cu2+
zinc ion, Zn2+
A few drops of sodium hydroxide solution was added to a metal salt solution. A brown gelatinous precipitate was formed. Which metal ion (cation) was present in the salt solution? [id-18]
iron(II) ion, Fe2+
iron(III) ion, Fe3+
copper(II) ion, Cu2+
zinc ion, Zn2+
A few drops of sodium hydroxide solution was added to a metal salt solution. A blue gelatinous precipitate was formed. Which metal ion (cation) was present in the salt solution? [id-19]
iron(II) ion, Fe2+
iron(III) ion, Fe3+
copper(II) ion, Cu2+
zinc ion, Zn2+
A few drops of sodium hydroxide solution was added to a metal salt solution. A white gelatinous precipitate was formed. Which metal ion (cation) was present in the salt solution? (Advanced level note: The white precipiate dissolves in excess dil. sodium hydroxide to give a clear colourless solution) [id-20]
iron(II) ion, Fe2+
iron(III) ion, Fe3+
copper(II) ion, Cu2+
zinc ion, Zn2+
A sample of a salt was dissolved in hydrochloric acid. A platinum wire was dipped into the solution and then placed in a roaring bunsen flame. A bright yellow flame colour was produced. From this 'flame test' observation, what was the identity of the metal ion in the salt? [id-21]
sodium ion, Na+
copper(II) ion, Cu2+
potassium ion, K+
calcium ion, Ca2+
A sample of a salt was dissolved in hydrochloric acid. A platinum wire was dipped into the solution and then placed in a roaring bunsen flame. A blue flame colour was produced. From this 'flame test' observation, what was the identity of the metal ion in the salt? [id-22]
sodium ion, Na+
copper(II) ion, Cu2+
potassium ion, K+
calcium ion, Ca2+
A sample of a salt was dissolved in hydrochloric acid. A platinum wire was dipped into the solution and then placed in a roaring bunsen flame. A lilac/violet flame colour was produced. From this 'flame test' observation, what was the identity of the metal ion in the salt? [id-23]
sodium ion, Na+
copper(II) ion, Cu2+
potassium ion, K+
calcium ion, Ca2+
A sample of a salt was dissolved in hydrochloric acid. A platinum wire was dipped into the solution and then placed in a roaring bunsen flame. A brick red flame colour was produced. From this 'flame test' observation, what was the identity of the metal ion in the salt? [id-24]
sodium ion, Na+
copper(II) ion, Cu2+
potassium ion, K+
calcium ion, Ca2+
A white solid X dissolved in dilute hydrochloric. A colourless gas evolved which turned limewater milky. When a drop of the solution, on the end of a platium wire, a bright yellow flame colour was observed when the platinum wirewas placed in a roaring bunsen flame. From these observations deduce the identity of substance X. [id-25]
sodium carbonate, Na2CO3
potassium sulfite, K2SO3
calcium carbonate, CaCO3
sodium sulfate, Na2SO4
A blue solid X was dissolved in water and the solution divided into two portions. When a few drops of sodium hydroxide was added to the 1st portion, a blue gelatinous precipitate formed. When a few drops of dilute nitric acid, followed by a few drops of barium nitrate solution was added to the 2nd portion, a white precipitate formed. From these observations deduce the identity of substance X. [id-26]
calcium
sulfate, CaSO4
copper(II)
sulfate, CuSO4
potassim chloride, KCl
copper(II) chloride, CuCl2
Colourless crystals of substance X were dissolved in water and a few drops of dil. nitric acid, followed by a few drops of silver nitrate solution were added, and a white precipitate formed. A few crystals of X were mixed with a few drops of conc. hydrochloriic acid. When a platinum wire was dipped in this mixture, and then placed in a roaring bunsen flame, a red flame colour was seen. From these observations deduce the identity of substance X. [id-27]
potassium
sulfate, K2SO4
copper(II) chloride, CuCl2
calcium chloride, CaCl2
sodium sulfate, Na2SO4
Colourless crystals of substance X were dissolved in water and a few drops of dil. nitric acid, followed by a few drops of silver nitrate solution were added, and a yellow precipitate formed. A few crystals of X were mixed with a few drops of conc. hydrochloric acid. When a platinum wire was dipped in this mixture, and then placed in a roaring bunsen flame, a purple-lilac flame colour was seen. From these observations deduce the identity of substance X. [id-28]
lead(II) iodide, PbI2
potassium
sulfate, K2SO4
copper(II) chloride, CuCl2
potassium iodide, KI
To a colourless solution X, a few drops of dil. nitric acid, followed by a few drops of silver nitrate solution were added, and a white precipitate formed. When a few drops of litmus solution were added to solution X, the solution turned red. There was no characteristic flame colour when a drop of X on the end of a platinum wire, was placed in a roaring bunsen flame. From these observations deduce the identity of solution X. [id-29]
hydrochloric acid, HCl
sulfuric acid, H2SO4
sodium hydroxide, NaOH
calcium hydroxide, Ca(OH)2
To a colourless solution X, a few drops of dil. hydrochloric acid were added, followed by a few drops of barium chloride, and a white precipitate formed. When a few drops of litmus solution were added to solution X, the solution turned red. There was no characteristic flame colour when a drop of X on the end of a platinum wire, was placed in a roaring bunsen flame. From these observations deduce the identity of solution X. [id-30]
hydrochloric acid, HCl
sulfuric acid, H2SO4
sodium hydroxide, NaOH
calcium hydroxide, Ca(OH)2
A colourless solution gave bright yellow flame colour when tested on the end of a platinum wire placed in a roaring bunsen flame. When a few drops of litmus solution were added to solution X, the solution turned blue. From these observations deduce the identity of solution X. [id-31]
hydrochloric acid, HCl
sulfuric acid, H2SO4
sodium hydroxide, NaOH
calcium hydroxide, Ca(OH)2
A colourless solution gave a brick red colour flame when tested on the end of a platinum wire placed in a roaring bunsen flame. When a few drops of litmus solution were added to solution X, the solution turned blue. From these observations deduce the identity of solution X. [id-32]
hydrochloric acid, HCl
sulfuric acid, H2SO4
sodium hydroxide, NaOH
calcium hydroxide, Ca(OH)2
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-1]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
has a fixed melting point?
true or false?
true or false?
true or false?
true, true, false
true, false, false
false, false, true
false, true, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-2]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
has only one type of atom?
true or false?
true or false?
true or false?
true, true, false
true, false, false
false, false, true
false, true, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-3]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
always has the same composition?
true or false?
true or false?
true or false?
false, true, true
true, false, false
true, true, false
false, false, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-4]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
has a definite chemical symbol or formula?
true or false?
true or false?
true or false?
false, false, true
true, false, true
false, true, false
true, true, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-5]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
has no fixed boiling point?
true or false?
true or false?
true or false?
false, false, true
true, false, true
false, true, false
true, true, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-6]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
is easily separated into different substances?
true or false?
true or false?
true or false?
false, true, true
false, false, true
true, true, false
true, false, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-7]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
has more than one type of atom?
true or false?
true or false?
true or false?
true, true, false
false, false, true
false, true, true
true, false, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-8]
STATEMENT about ....
ELEMENT
COMPOUND
MIXTURE
there are only about 100 of them?
true or false?
true or false?
true or false?
true, true, false
false, false, true
false, true, true
true, false, false
/What is the formula of the molecule? [8f-9]
C2H6O
2C6HO
C3H6
C6H2O
What is the formula of the molecule? [8f-10]
C5H6I2
C3H6Cl2
C6H3Cl2
C2H6Cl3
What is the formula of the molecule? [8f-11]
C8H3
3C8H
C3H8
C3H6
What is the formula of the molecule? [8f-12]
C2H6O3
3C6H2O
C5H6O
C3H6O2
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-13]
the boiling point is higher than pure water
the freezing point is higher than pure water
the boiling point decreases the longer the solution is boiled
the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-14]
the boiling point is lower than pure water
the freezing point is lower than pure water
the boiling point decreases the longer the solution is boiled
the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-15]
the boiling point is lower than pure water
the freezing point is higher than pure water
the boiling point increases the longer the solution is boiled
the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-16]
the boiling point is lower than pure water
the freezing point is higher than pure water
the boiling point decreases the longer the solution is boiled
the solution becomes more concentrated the longer it is boiled
Which order of the three words matches the three substances iron, iron oxide, steel ?, ?, ? [8f-17]
element, compound, mixture
compound, element, mixture
mixture, compound, element
element, mixture, compound
Which order of the three words matches the three substances salt, sodium, seawater ?, ?, ? [8f-18]
element, compound, mixture
compound, element, mixture
mixture, compound, element
element, mixture, compound
Which order of the three words matches the three substances brass, copper oxide, zinc ?, ?, ? [8f-19]
element, compound, mixture
compound, element, mixture
mixture, compound, element
element, mixture, compound
Which order of the three words matches the three substances hydrogen, petrol, water ?, ?, ? [8f-20]
element, compound, mixture
compound, element, mixture
mixture, compound, element
element, mixture, compound
Which order of the three words matches the three substances carbon dioxide, coal, carbon ?, ?, ? [8f-21]
compound, mixture, element
mixture, compound, element
element, mixture, compound
compound, element, mixture
Which order of the three words matches the three substances plaster of Paris, gypsum, flowers of
sulfur ?, ?, ? [8f-22]
compound, mixture, element
mixture, compound, element
element, mixture, compound
compound, element, mixture
Which order of the three words matches the three substances chlorine, rock salt, sodium chloride ?, ?, ? [8f-23]
compound, mixture, element
mixture, compound, element
element, mixture, compound
compound, element, mixture
Which order of the three words matches the three substances sodium hydroxide, oxygen, bleach ?, ?, ? [8f-24]
compound, mixture, element
mixture, compound, element
element, mixture, compound
compound, element, mixture
Which two words apply to the substance nitrogen? [8f-25]
gas, element
liquid, compound
solid, mixture
gas, compound
Which two words apply to the substance copper
sulfate? [8f-26]
gas, element
solid, compound
solid, mixture
gas, compound
Which two words apply to the substance wood? [8f-27]
gas, element
solid, compound
solid, mixture
gas, compound
Which two words apply to the substance
sulfur dioxide? [8f-28]
gas, element
solid, compound
solid, mixture
gas, compound
Which two words apply to the substance vinegar? [8f-29]
liquid, mixture
solid, element
gas, mixture
liquid, element
Which two words apply to the substance magnesium? [8f-30]
liquid, mixture
solid, element
gas, mixture
liquid, element
Which two words apply to the substance air? [8f-31]
liquid, mixture
solid, element
gas, mixture
liquid, element
Which two words apply to the substance mercury? [8f-32]
liquid, mixture
solid, element
gas, mixture
liquid, element
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-33]
at the start they are a mixture
at the end they are a mixture
at the start they cannot be separated with a magnet
at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-34]
at the start they are a compound
at the end they are a compound
at the start they cannot be separated with a magnet
at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-35]
at the start they are a compound
at the end they are a mixture
at the start they can be separated with a magnet
at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-36]
at the start they are a compound
at the end they are a mixture
at the start they cannot be separated with a magnet
at the end they cannot be separated with a magnet
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-37]
the colour change suggests a chemical reaction has happened overall
FeS describes them at the start, Fe + S describes them at the end
at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-38]
the colour change suggests a physical change has happened overall
Fe + S describes them at the start, FeS describes them at the end
at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-39]
the colour change suggests a physical change has happened overall
FeS describes them at the start, Fe + S describes them at the end
at the start, acid will act on the iron forming hydrogen and hydrogen
sulfide gas is formed with acid and the dark-grey solid product
the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-40]
the colour change suggests a physical change has happened overall
FeS describes them at the start, Fe + S describes them at the end
at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
the red glow without heating suggests overall a chemical change has happened to the mixture when cool
Which method of separation is best to use for separating petrol from crude oil? [8f-41]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for obtaining salt from seawater? [8f-42]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for removing silt from muddy water? [8f-43]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for investigating the composition of food dyes in sweet colours? [8f-44]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for purifying water containing small quantities of dissolved minerals? [8f-45]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for obtaining fertiliser crystals from neutralising nitric acid solution with the alkali ammonia? [8f-46]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for separating a solid product* formed from mixing two solutions? (* called a precipitate) [8f-47]
distillation
evaporation
filtration
chromatography
Which method of separation is best to use for checking which ink was used in a forged cheque? [8f-48]
distillation
evaporation
filtration
chromatography
Which particle is a compound made up of three elements? [8f-49]
8
2
4
7
Which particle is a compound made up of three elements? [8f-50]
2
9
4
7
Which particle is an element made up of single atoms? [8f-51]
1
6
3
5
Which particle is a compound made up of two elements? [8f-52]
3
5
6
1
Which particle is a compound made up of two elements? [8f-53]
7
8
6
3
Which particle is a molecule made of 4 atoms? [8f-54]
7
6
8
2
Which particle is formed when two different colourless gases chemically combine? [8f-55]
7
6
4
2
Which particle is formed when a black solid and a colourless gas chemically combine? [8f-56]
9
6
4
2
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