WorksheetsU14 Redox Quizizz
Total questions: 20
Worksheet time: 38mins
2 CaO--> 2 Ca + O2
Which energy conversion shown below takes place in a voltaic cell?
Electrical to chemical
Mechanical to chemical
Mechanical to electrical
Chemical to electrical
Oxidation is the _________ of electrons.
loss
gain
sharing
transfer
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
Gaining hydrogen is an example of...
oxidation
reduction
Gaining oxygen is an example of...
oxidation
reduction
Which of the following represents oxidation?
C → CH4
Fe3+ → Fe2+
Cl2 → 2Cl-
Zn → ZnO
Mg → Mg2+ + 2e–
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 nitrogen in N2?
-3
0
+4
-1
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
In the reaction Zn + 2HCl --> ZnCl2 + H2
which element, if any, is oxidized?
Zinc
Hydrogen
Chlorine
None
2CaO--> 2Ca + O2
