15209613
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace alrededor de 6 años
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Pregunta 1
Pregunta
Aluminium reacts with iron(III) oxide as shown.
iron(III) oxide + aluminium → iron + aluminium oxide
Which statement about this reaction is correct?
Respuesta
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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.
Pregunta 2
Pregunta
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?
Respuesta
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A Fe2O3
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B CO
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C ZnO
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D NO
Pregunta 3
Pregunta
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)
Respuesta
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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
Pregunta 4
Pregunta
The element vanadium, V, forms several oxides.
In which change is oxidation taking place?
Respuesta
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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
Pregunta 5
Pregunta
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?
Respuesta
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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.
Pregunta 6
Respuesta
-
A
-
B
-
C
-
D
Pregunta 7
Pregunta
In which equation does the oxidation of the underlined compound occur?
Respuesta
-
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)
Pregunta 8
Respuesta
-
A
-
B
-
C
-
D
Pregunta 9
Pregunta
When copper is heated in air a black coating forms on the copper.
What happens to the copper in this reaction?
Respuesta
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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.
Pregunta 10
Respuesta
-
A
-
B
-
C
-
D
Pregunta 11
Pregunta
The equation shows a reaction that is reversed by changing the conditions.
How can the forward reaction be reversed?
Image:
Q12 (binary/octet-stream)
Respuesta
-
A
-
B
-
C
-
D
Pregunta 12
Pregunta
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)
Respuesta
-
A
-
B
-
C
-
D
Pregunta 13
Pregunta
The equations represent redox reactions.
In which equation is the underlined substance acting as a reducing agent?
Image:
Q16 (binary/octet-stream)
Respuesta
-
A
-
B
-
C
-
D
Pregunta 14
Pregunta
Which statement describes what happens in the reaction shown?
Image:
Q17 (binary/octet-stream)
Respuesta
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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.
Pregunta 15
Respuesta
-
A
-
B
-
C
-
D
Pregunta 16
Pregunta
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?
Respuesta
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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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