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WorksheetsRedox Reactions
Total questions: 20
Worksheet time: 29mins
2 CaO--> 2 Ca + O2
What is the oxidation number of chlorine in HClO?
0
-1
+1
+5
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
What is the oxidation number of iodine in KIO3?
0
-1
+5
+1
Determine the oxidation number of chromate in CrO42-.
+6
0
+2
+3
Which of the following represents oxidation?
C → CH4
Fe3+ → Fe2+
Cl2 → 2Cl-
Zn → ZnO
In the reaction Zn + 2HCl --> ZnCl2 + H2
which element, if any, is oxidized?
Zinc
Hydrogen
Chlorine
None
What is the oxidation number of C in SrCO3?
-4
+2
-6
+4
Substance that oxidizes another substance by accepting its electrons.
reducing agent
oxidation number
disproportionation
oxidizing agent
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
What is the oxidation number of X in XO4-?
+4
+5
+7
+8
The following chemical equation represents the extraction of silicon from quartz using coke.
SiO2 + C → Si + CO2
What is the change in oxidation number of silicon?
+2 to 0
+4 to 0
0 to +2
0 to +4
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 oxidation number of Mn in the following: MnO4-, MnO42- and MnO2?
+4, +6, +7
+7, +6, +4
+2, +4, +7
+5, +3, +4
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)
Al (s) + FeSO4 (aq) → Al2(SO4)3 (aq) + Fe (s)
Which statements are true about this reaction?
I. Al (s) reduces Fe2+ (aq)
II. Al (s) is the oxidizing agent.
III. FeSO4 is the reducing agent.
I and II only
I and III only
II and III only
I, II and III
Which statement is NOT true when the following redox reaction is balanced?
Cu (s) + NO3- (aq) → NO (g) + Cu2+ (aq) [acidic]
There are 8H+ (aq) in the reactant side.
There are 2H2O (l) in the product side.
There are 4H2O (l) in the product side.
There are 6e- in both half-equations.
