Quiz
IGCSE Redox Reactions
Perguntas do quiz (16)
1Aluminium reacts with iron(III) oxide as shown.
iron(III) oxide + aluminium → iron + aluminium oxide
Which statement about this reaction is correct?- AA Aluminium is oxidised.
- BB Aluminium oxide is reduced.
- CC Iron(III) oxide is oxidised.
- DD Iron is oxidised.
2The 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?- AA Fe2O3
- BB CO
- CC ZnO
- DD NO
3 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?
- AA aluminium
- BB aluminium oxide
- CC chromium
- DD chromium(III) oxide
4The element vanadium, V, forms several oxides.
In which change is oxidation taking place?- AA VO2 → V2O3
- BB V2O5 → VO2
- CC V2O3 → VO
- DD V2O3 → V2O5
5The reaction between magnesium and carbon dioxide is represented by the following equation.
2Mg + CO2 → 2MgO + C
Which statement describes what happens in this reaction?- AA Carbon is oxidised.
- BB Magnesium is reduced.
- CC Neither oxidation nor reduction happens.
- DD The carbon in carbon dioxide is reduced.
6In which change is chromium(II) oxide, CrO, reduced?
- AA
- BB
- CC
- DD
7In which equation does the oxidation of the underlined compound occur?
- A
- B
- C
- D
- A
8In which change is N2O3 oxidised?
- AA
- BB
- CC
- DD
9When copper is heated in air a black coating forms on the copper.
What happens to the copper in this reaction?- AA The copper catches fire.
- BB The copper decomposes.
- CC The copper gains oxygen.
- DD The copper loses oxygen.
10Which equation shows an oxidation reaction?
- AA
- BB
- CC
- DD
11The equation shows a reaction that is reversed by changing the conditions.
How can the forward reaction be reversed?
- AA
- BB
- CC
- DD
12Equations P and Q represent two reactions which occur inside a blast furnace.
Which type of reactions are P and Q?
- AA
- BB
- CC
- DD
13The equations represent redox reactions.
In which equation is the underlined substance acting as a reducing agent?
- AA
- BB
- CC
- DD
14 Which statement describes what happens in the reaction shown?
- AA Carbon and magnesium are both oxidised.
- BB Carbon is oxidised and magnesium oxide is reduced.
- CC Magnesium is oxidised and carbon dioxide is reduced.
- DD Magnesium oxide and carbon dioxide are both reduced.
15n which reaction is lead(II) oxide, PbO, oxidised?
- AA
- BB
- CC
- DD
16Iron 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?- AA Carbon monoxide is oxidised to carbon dioxide.
- BB Carbon monoxide is reduced to carbon dioxide.
- CC Iron is oxidised to iron oxide.
- DD Iron oxide is oxidised to iron.
Informações
- Descrição
- Quiz for 0654 IGCSE Coordinated Science Redox topic
- Autor
- Jeffrey Piggott
- Idioma
- English
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