15209613
Description
Quiz by Jeffrey Piggott, updated more than 1 year ago
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Created by Jeffrey Piggott
about 6 years ago
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Question 1
Question
Aluminium reacts with iron(III) oxide as shown.
iron(III) oxide + aluminium → iron + aluminium oxide
Which statement about this reaction is correct?
Answer
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A Aluminium is oxidised.
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B Aluminium oxide is reduced.
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C Iron(III) oxide is oxidised.
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D Iron is oxidised.
Question 2
Question
The equations below all show redox reactions.
Fe2O3 + 3CO → 2Fe + 3CO2
2ZnO + C → 2Zn + CO2
Fe2O3 + 2Al → Al 2O3 + 2Fe
2CO + 2NO → 2CO2 + N2
Which oxide is oxidised in these reactions?
Answer
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A Fe2O3
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B CO
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C ZnO
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D NO
Question 3
Question
A violent reaction occurs when a mixture of chromium(III) oxide and aluminium is ignited with a magnesium fuse as shown.
The equation for the reaction is shown.
Cr2O3 + 2Al → 2Cr + Al2O3
Which substance is oxidised in the reaction?
Image:
Q3 (binary/octet-stream)
Answer
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A aluminium
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B aluminium oxide
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C chromium
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D chromium(III) oxide
Question 4
Question
The element vanadium, V, forms several oxides.
In which change is oxidation taking place?
Answer
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A VO2 → V2O3
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B V2O5 → VO2
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C V2O3 → VO
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D V2O3 → V2O5
Question 5
Question
The reaction between magnesium and carbon dioxide is represented by the following equation.
2Mg + CO2 → 2MgO + C
Which statement describes what happens in this reaction?
Answer
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A Carbon is oxidised.
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B Magnesium is reduced.
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C Neither oxidation nor reduction happens.
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D The carbon in carbon dioxide is reduced.
Question 6
Answer
-
A
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B
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C
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D
Question 7
Question
In which equation does the oxidation of the underlined compound occur?
Answer
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Image:Q7a (binary/octet-stream)
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Image:Q7b (binary/octet-stream)
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Image:Q7c (binary/octet-stream)
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Image:Q7d (binary/octet-stream)
Question 8
Answer
-
A
-
B
-
C
-
D
Question 9
Question
When copper is heated in air a black coating forms on the copper.
What happens to the copper in this reaction?
Answer
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A The copper catches fire.
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B The copper decomposes.
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C The copper gains oxygen.
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D The copper loses oxygen.
Question 10
Answer
-
A
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B
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C
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D
Question 11
Question
The equation shows a reaction that is reversed by changing the conditions.
How can the forward reaction be reversed?
Image:
Q12 (binary/octet-stream)
Answer
-
A
-
B
-
C
-
D
Question 12
Question
Equations P and Q represent two reactions which occur inside a blast furnace.
Which type of reactions are P and Q?
Image:
Q15 (binary/octet-stream)
Answer
-
A
-
B
-
C
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D
Question 13
Question
The equations represent redox reactions.
In which equation is the underlined substance acting as a reducing agent?
Image:
Q16 (binary/octet-stream)
Answer
-
A
-
B
-
C
-
D
Question 14
Question
Which statement describes what happens in the reaction shown?
Image:
Q17 (binary/octet-stream)
Answer
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A Carbon and magnesium are both oxidised.
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B Carbon is oxidised and magnesium oxide is reduced.
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C Magnesium is oxidised and carbon dioxide is reduced.
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D Magnesium oxide and carbon dioxide are both reduced.
Question 15
Answer
-
A
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B
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C
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D
Question 16
Question
Iron is extracted from iron oxide using carbon monoxide as shown in the equation.
iron oxide + carbon monoxide → iron + carbon dioxide
What does the equation show?
Answer
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A Carbon monoxide is oxidised to carbon dioxide.
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B Carbon monoxide is reduced to carbon dioxide.
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C Iron is oxidised to iron oxide.
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D Iron oxide is oxidised to iron.
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