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WorksheetsRed-Ox
Total questions: 20
Worksheet time: 18mins
The equations below all show redox reactions.
Which oxide is oxidised in these reactions?
Fe2O3
CO
ZnO
NO
Which change is an oxidation?
FeO to Fe2O3
Fe2O3 to FeO
H2O2 to H2O
H2O to H2
2CaO--> 2Ca + O2
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
4Fe + 3O2 --> 2Fe2O3
Which compound has manganese with oxidation number +6?
K2MnO4
KMnO4
MnO2
MnCl2
which element, if any, is oxidized?
In the reaction Zn + 2HCl --> ZnCl2 + H2
which element, is oxidized?
Dalam persamaan Zn + 2HCl --> ZnCl2 + H2
unsur manakah telah dioksidakan?
Zinc
Zink
Hydrogen
Hidrogen
Chlorine
Klorin
None
Tiada
Br2 + 2KI ----> 2KBr + I2
Which substance is oxidising agent?
Bahan manakah agen pengoksidaan
Bromine water
Air bromin
Potassium iodide
Kalium iodida
Potassium bromide
Kalium bromida
Iodine
Iodin
Zn + CuSO4 ----> ZnSO4 + Cu
Which substance is oxidising agent?
Bahan manakah agen pengoksidaan?
Zn
Zn2+
Cu
Cu2+
Which equation represents a redox reaction?
NaOH + HNO3 → NaNO3 +H2O
2AgNO3 + Zn → Zn(NO3)2 + 2Ag
2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3
CaCO3 + 2HCl → CaCl2 + H2O + CO2
Consider the following reaction.
NO3− (aq) + Cu (s) → NO (g) + Cu2+ (aq)
Which statement is correct?
Cu (s) is the reducing agent because it loses electrons.
Cu (s) is the reducing agent because it gains electrons.
Cu (s) is the oxidizing agent because it loses electrons.
Cu (s) is the oxidizing agent because it gains electrons.
What is the oxidizing agent in the following reaction?
Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s)
Zn (s)
Cu2+ (aq)
Zn2+ (aq)
Cu (s)
Which substance is the reducing agent?
2Fe2+(aq) + Cl2 (aq) →2Fe3+(s) +2Cl- (aq)
Fe2+
Cl2
Which element is oxidised in the reaction Zn + 2HCl → ZnCl2 + H2
Zinc
Hydrogen
Chlorine
None
