Quizizz: 25-minute Test
Part III Metals
Quizizz: 25-minute Test
Part III
Metals
Name: ________________________ (
)
Class: ____________
There are 20 multiple-choice questions in total.
Answer ALL questions.
Time allowed: 25 minutes
Date: ________________
Marks:
1.
1 mol of magnesium nitrate contains
A. 2 mol of cations.
B. 2 mol of anions.
C. 3 mol of atoms.
D. 9 mol of ions.
2.
Which of the following statements concerning anodization is correct?
A. The strength of the aluminium object is enhanced by anodization.
B.
C.
D.
The whole aluminium object becomes aluminium oxide after anodization.
The shape of the aluminium object can be changed by anodization.
Anodization is a chemical change.
3.
Which of the following solutions will turn blue when a piece of copper is added to it?
A. Ammonium nitrate solution
B. Calcium nitrate solution
C. Iron(II) nitrate solution
D. Silver nitrate solution
4.
Which of the following compounds has the highest percentage by mass of iron?
(Relative atomic masses: N = 14.0, O = 16.0, S = 32.1, Cl = 35.5, Fe = 55.8)
A. Iron(II) chloride
B. Iron(II) sulphate
C. Iron(III) nitrate
D. Iron(III) oxide
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Quizizz: 25-minute Test
5.
Part III Metals
The following diagram shows a set-up used to investigate the effect of nitrogen and air on
rusting.
damp iron wool
nitrogen
air
tube X
tube Y
water
The set-up is left for five days. What happens to the water level in tubes X and Y respectively?
A.
B.
C.
D.
Tube Y
rises
remains unchanged
remains unchanged
remains unchanged
Mass / g
A certain mass of copper is heated strongly in a crucible. Which of the following graphs
represents the change in mass of the content in the crucible over time?
A.
B.
Mass / g
6.
Tube X
remains unchanged
remains unchanged
falls
rises
Time / s
Time / s
D.
Mass / g
Mass / g
C.
Time / s
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Time / s
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Quizizz: 25-minute Test
Part III Metals
7.
Copper can be obtained from chalcopyrite, a mineral consisting of CuFeS2. What is the
minimum mass of chalcopyrite required to obtain 1.5 g of copper?
(Relative atomic masses: S = 32.1, Fe = 55.8, Cu = 63.5)
A. 2.3 g
B. 3.3 g
C. 4.3 g
D. 5.3 g
8.
The following table shows the results of heating metals P, Q, R and S:
Metal
Observation upon heating
P
It burns with a lilac flame to produce a white powder.
Q
There is no observable change.
R
It burns with a very bright white flame to produce a white powder.
S
It burns with a golden yellow flame to produce a white powder.
Which of the four metals is the most reactive?
A.
B.
C.
D.
9.
Metal P
Metal Q
Metal R
Metal S
How many moles of hydrogen will be produced when 4.0 g of calcium reacts completely with
water?
(Relative atomic mass: Ca = 40.1)
A. 0.010 mol
B. 0.020 mol
C. 0.10 mol
D. 0.20 mol
10. Which of the following iron objects is usually prevented from rusting by electroplating?
A. Food can
B. Water bucket
C. Water tap
D. Coat hanger
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Quizizz: 25-minute Test
Part III Metals
11. When 11.16 g of lead(II) oxide is heated with 0.36 g of carbon powder, 6.22 g of lead forms.
Which of the following combinations is correct?
(Relative atomic masses: C = 12.0, O = 16.0, Pb = 207.2)
Limiting reactant
Percentage yield of lead
A.
Lead(II) oxide
56.0%
B.
Lead(II) oxide
60.0%
C.
Carbon
50.0%
D.
Carbon
100%
12. The reactions about metals X, Y and Z take place spontaneously as follows:
X(s) + 2Z +(aq) ® X 2+(aq) + 2Z(s)
Z(s) + Y 2+(aq) ® Z 2+(aq) + Y(s)
Which of the following is the correct order of reactivity of the three metals?
A. X > Y > Z
B. X > Z > Y
C. Z > X > Y
D. Z > Y > X
13. Which of the following statements are correct when silver oxide is heated?
(1) The colour of the solid changes from black to silvery.
(2) The mass of the solid decreases.
(3) A colourless gas which turns limewater milky is given out.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
14. Which of the following reactions will produce hydrogen?
(1) Reaction of potassium with water
(2) Reaction of copper with dilute sulphuric acid
(3) Reaction of magnesium with steam
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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Part III Metals
15. Which of the following statements are correct when a piece of sodium is added to water?
(1) The sodium moves about quickly on the water surface.
(2) The sodium burns with a lilac flame.
(3) An alkaline solution is produced at the end of the reaction.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
16. When the coating of a tin-coated iron can is scratched, the can rusts more quickly. Which of the
following is/are the correct explanation(s) for this phenomenon?
(1) Iron is more reactive than tin.
(2) The food inside the can is not greasy enough.
(3) Oxygen and water can reach iron.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
17. Which of the following metals can be extracted by heating their ores with carbon?
(1) Calcium
(2) Lead
(3) Zinc
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
18. Strontium is a Group II element below calcium in the Periodic Table. Which of the following
statements concerning strontium are correct?
(1) It reacts vigorously with water.
(2) It sinks to the bottom of water.
(3) It can be obtained from electrolysis of solid strontium chloride.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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Quizizz: 25-minute Test
Part III Metals
19. Which of the following chemical equations representing the extraction of iron from iron(III)
oxide are correct?
heat
4Fe(s) + 3O2(g)
(1) 2Fe2O3(s)
(2) 2Fe2O3(s) + 3C(s) ® 4Fe(l) + 3CO2(g)
(3) Fe2O3(s) + 3CO(g) ® 2Fe(l) + 3CO2(g)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
20. Metal X can be extracted by heating its oxide alone. Metal Y reacts with water to give a
colourless gas. There is no observable change when heating the oxide of metal Z with carbon.
Which of the following predictions about the order of discovery of the metals (starting from the
earliest) must be INCORRECT?
(1) Z ® X ® Y
(2) X ® Z ® Y
(3) Y ® X ® Z
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
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Quizizz: 25-minute Test
Part III Metals
Answers
1.
B
1 mol of Mg(NO3)2 contains 1 mol of Mg2+ ions (cations) and 2 mol of NO3- ions (anions).
2.
D
Anodization cannot enhance the strength of aluminium. During anodization, the aluminium on
the surface of the article becomes aluminium oxide.
2Al(s) + 3H2O(l) ® Al2O3(s) + 3H2(g)
The protective oxide layer is thickened and aluminium becomes more corrosion resistant.
3.
D
Copper displaces silver from silver nitrate solution. It dissolves to form blue Cu2+(aq) ions.
4.
D
55.8
× 100% = 44.0%
55.8 + 35.5 ´ 2
55.8
Percentage by mass of Fe in FeSO4 =
× 100% = 36.7%
55.8 + 32.1 + 16.0 ´ 4
55.8
Percentage by mass of Fe in Fe(NO3)3 =
× 100% = 23.1%
55.8 + (14.0 + 16.0 ´ 3) ´ 3
55.8 ´ 2
Percentage by mass of Fe in Fe2O3 =
× 100% = 69.9%
55.8 ´ 2 + 16.0 ´ 3
Percentage by mass of Fe in FeCl2 =
5.
A
Both water and oxygen are necessary for rusting to occur.
In tube X, there is no oxygen inside and rusting does not occur. Therefore, the water level
remains unchanged.
In tube Y, the iron would rust because both water and oxygen are present. When iron rusts,
oxygen in air is consumed. Hence, the water level rises.
6.
B
The mass of the content in the crucible increases since copper reacts with oxygen to form
copper(II) oxide.
2Cu(s) + O2(g) ® 2CuO(s)
7.
C
1.5
mol = 0.024 mol
63.5
No. of moles of CuFeS2 required = 0.024 mol
Minimum mass of chalcopyrite required = 0.024 × (63.5 + 55.8 + 32.1 × 2) g = 4.3 g
No. of moles of Cu required =
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Quizizz: 25-minute Test
Part III Metals
8.
A
Metal P is potassium, metal R is magnesium, metal S is sodium and metal Q is the least reactive
metal which has no reaction with air.
9.
C
Ca(s) + 2H2O(l) ® Ca(OH)2(aq) + H2(g)
4.0
No. of moles of Ca =
mol = 0.10 mol
40.1
From the equation, mole ratio of Ca : H2 is 1 : 1.
∴no. of moles of H2 produced = 0.10 mol
10. C
Iron object
Food can
Method to prevent rusting
Tin-plating
Water bucket
Galvanizing
Water tap
Electroplating
Coat hanger
Coating with plastic
11. B
2PbO(s) + C(s) ® 2Pb(s) + CO2(g)
11.16
No. of moles of PbO =
mol = 0.05 mol
207.2 + 16.0
0.36
No. of moles of C =
mol = 0.03 mol
12.0
From the equation, mole ratio of PbO : C is 2 : 1.
∴0.05 mol of PbO would react with 0.025 mol of C.
∴C is in excess and PbO is the limiting reactant.
From the equation, mole ratio of PbO : Pb is 1 : 1.
∴theoretical yield of Pb = 0.05 × 207.2 g = 10.36 g
6.22
Percentage yield of Pb =
× 100% = 60.0%
10.36
12. B
Metal X is more reactive than metal Z because X can displace Z from its solution.
Metal Z is more reactive than metal Y because Z can displace Y from its solution.
13. A
Silver oxide (black in colour) decomposes to silver and oxygen on strong heating. Oxygen does
not turn limewater milky.
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Quizizz: 25-minute Test
Part III Metals
14. B
(1): 2K(s) + 2H2O(l) ® 2KOH(aq) + H2(g)
(2): Copper has no reaction with dilute sulphuric acid.
(3): Mg(s) + H2O(g) ® MgO(s) + H2(g)
15. B
Sodium burns with a golden yellow flame. The resultant solution is alkaline because sodium
hydroxide solution is produced.
2Na(s) + 2H2O(l) ® 2NaOH(aq) + H2(g)
16. C
Tin is less reactive than iron. If the tin coating is scratched, iron will lose electrons more readily
and so it will rust more quickly than expected.
17. D
Calcium is extracted by electrolysis of its molten ore.
18. A
Strontium is more reactive than calcium. Like calcium, strontium sinks to the bottom of water.
Solid strontium chloride cannot conduct electricity as its ions are not mobile. Thus, it cannot be
electrolysed.
19. C
Iron cannot be extracted by heating iron(III) oxide alone.
20. C
X is less reactive than Z because X can be extracted by heating its oxide alone while Z cannot. X
is less reactive than Y because X cannot react with water while Y can. Therefore, X must be the
least reactive metal among the three metals. It was discovered earlier than Y and Z.
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