Aluminium reacts with iron(III) oxide as shown. iron(III) oxide + aluminium → iron + aluminium oxide
Which statement about this reaction is correct?
B Aluminium oxide is reduced.
D Iron is oxidised.
A Aluminium is oxidised.
C Iron(III) oxide is oxidised.
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?
D NO
B CO
C ZnO
A Fe2O3
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?
B aluminium oxide
D chromium(III) oxide
A aluminium
C chromium
The element vanadium, V, forms several oxides. In which change is oxidation taking place?
C V2O3 → VO
D V2O3 → V2O5
A VO2 → V2O3
B V2O5 → VO2
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?
D The carbon in carbon dioxide is reduced.
C Neither oxidation nor reduction happens.
B Magnesium is reduced.
A Carbon is oxidised.
In which change is chromium(II) oxide, CrO, reduced?
B
D
A
C
In which equation does the oxidation of the underlined compound occur?
In which change is N2O3 oxidised?
When copper is heated in air a black coating forms on the copper. What happens to the copper in this reaction?
B The copper decomposes.
D The copper loses oxygen.
A The copper catches fire.
C The copper gains oxygen.
Which equation shows an oxidation reaction?
The equation shows a reaction that is reversed by changing the conditions.
How can the forward reaction be reversed?
Equations P and Q represent two reactions which occur inside a blast furnace.
Which type of reactions are P and Q?
The equations represent redox reactions. In which equation is the underlined substance acting as a reducing agent?
Which statement describes what happens in the reaction shown?
B Carbon is oxidised and magnesium oxide is reduced.
C Magnesium is oxidised and carbon dioxide is reduced.
A Carbon and magnesium are both oxidised.
D Magnesium oxide and carbon dioxide are both reduced.
n which reaction is lead(II) oxide, PbO, oxidised?
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?
B Carbon monoxide is reduced to carbon dioxide.
A Carbon monoxide is oxidised to carbon dioxide.
D Iron oxide is oxidised to iron.
C Iron is oxidised to iron oxide.
Please wait - loading…