WorksheetsF5 Chem Chapter 1 Quiz 1.1
Total questions: 25
Worksheet time: 16mins
Oxidation is the process of _________ electrons.
losing
gaining
sharing
transferring
Reduction is the process of ___________ electrons.
losing
gaining
sharing
transferring
Gaining hydrogen is an example of...
oxidation
reduction
Which of the following represents oxidation?
C → CH4
Fe3+ → Fe2+
Cl2 → 2Cl-
Zn → ZnO
Which element is oxidised in the reaction Zn + 2HCl → ZnCl2 + H2
Zinc
Hydrogen
Chlorine
None
In a redox reaction, spectator ions...
become oxidised
become reduced
remain unchanged
What is the oxidation number of chlorine in HClO?
0
-1
+1
+5
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
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
Which element is oxidized?
H2S + Cl2 → 2HCl + S
H
S
Cl
Not a redox reaction
What element is being reduced?
I2 + H2SO3 + H2O --> 2 HI + H2SO4
I
H
S
O
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
What is the reducing agent here: N2 + 3H2 --> 2NH3
N2
H2
NH3
2NH3
What is the IUPAC name and oxidation number of copper element in the compound Cu2O?
Copper(I) oxide; +1
Copper(I) oxide; +2
Copper(II) oxide; +1
Copper(II) oxide; +2
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
In the reaction, Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
carbon monoxide is reduced
carbon monoxide is the oxidising agent
iron(III) oxide is oxidised
iron(III) oxide is the oxidising agent
The sum of the oxidation numbers in SCN- is equivalent to
0
-1
+1
+3
