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Chapter 1 - Transition Elements and Iron Metallurgy

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Lesson 4: Iron Chemical Properties, Reactions and Oxides — Picture questions (exam style)

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1.
Study the reaction scheme for iron and its compounds. Which option is correct?
Study the reaction scheme for iron and its compounds. Which option is correct?
C: Fe₃O₄, A: Fe₃O₄
C: FeCl₃, A: Fe(OH)₃
C: FeCl₃, A: Fe₃O₄
C: Fe(OH)₃, A: Fe
2.
A mixture of 10.92 g Fe and 11.2 g Fe₂O₃ is added to excess HCl. What volume of H₂ (STP) is evolved?
A mixture of 10.92 g Fe and 11.2 g Fe₂O₃ is added to excess HCl. What volume of H₂ (STP) is evolved?
4.37 L
2.18 L
8.85 L
6.55 L
3.
When 1.16 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 1.16 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
FeO
Fe₂O₃
FeO₂
Fe₃O₄
4.
Study the reaction scheme for iron and its compounds. Which option is correct?
Study the reaction scheme for iron and its compounds. Which option is correct?
C: Fe₂O₃, B: Fe₃O₄
C: FeCl₂, B: Fe
C: FeCl₃, B: FeO
C: Fe(OH)₃, B: Fe
5.
When 17.4 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 17.4 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
FeO
FeO₂
Fe₃O₄
Fe₂O₃
6.
25 mL of Fe2+(aq) is titrated with 0.02 M acidified KMnO₄ to a permanent pink; the burette shows the volume used. Find [Fe2+]. (MnO₄− + 5Fe2+ + 8H+ → Mn2+ + 5Fe3+ + 4H₂O)
25 mL of Fe²⁺(aq) is titrated with 0.02 M acidified KMnO₄ to a permanent pink; the burette shows the volume used. Find [Fe²⁺]. (MnO₄⁻ + 5Fe²⁺ + 8H⁺ → Mn²⁺ + 5Fe³⁺ + 4H₂O)
0.135 mol/L
0.0270 mol/L
5.39×10−3 mol/L
1.35×10−4 mol/L
7.
Study the reaction scheme for iron and its compounds. Which option is correct?
Study the reaction scheme for iron and its compounds. Which option is correct?
B: Fe(OH)₂, C: Fe₂O₃
B: Fe(OH)₂, C: FeSO₄
B: FeSO₄, C: Fe₂O₃
B: FeSO₄, C: Fe₃O₄
8.
When 9.28 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 9.28 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
FeO
FeO₂
Fe₃O₄
Fe₂O₃
9.
When 32 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 32 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
FeO
FeO₂
Fe₃O₄
Fe₂O₃
10.
When 1.6 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 1.6 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
Fe₃O₄
FeO₂
FeO
Fe₂O₃
11.
When 7.2 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 7.2 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
FeO
Fe₃O₄
Fe₂O₃
FeO₂
12.
When 3.6 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
When 3.6 g of an iron oxide is completely reduced, the mass of iron shown remains. What is the formula of the oxide?
Fe₂O₃
FeO
FeO₂
Fe₃O₄
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