NEW
Font size
WorksheetsOxidation and Reduction
Total questions: 21
Worksheet time: 44mins
Substances that lose electrons easily and are oxidized in a chemical reaction are ____________.
reducing agents
coloring agents
oxidizing agents
neutralizing agents
analytical agents
During the process of reduction, _________________
protons are lost.
protons are gained.
electrons are lost.
electrons are gained
neutrons are lost.
What is the oxidation number of Nitrogen in HNO3
-7
-5
+5
+7
+2
Identify the species reduced in the following reaction.
Fe(s) + 2 Ag+(aq) → Fe2+(aq) + 2 Ag(s)
Fe
Ag
none of these
None of the above
The below reaction is an example of _________reaction.
F2 → 2 F- + 2 e-
Oxidation
Reduction
Neutralization
decomposition
combustion
Find the oxidation number of Ca in CaH2
-2
-4
+2
+4
0
Oxidation is....
Gain of electrons
Loss of electrons
Both the loss and gain of electrons
None of these
Reduction is....
Gain of electrons
Loss of electrons
Both the loss and gain of electrons
None of these
What is the oxidation state of Nitrogen in N2 (g)?
4
6
2
0
Oxidation involves
gaining electrons; gaining oxygen
losing electrons; losing oxygen
gaining electrons; losing oxygen
losing electrons; gaining oxygen
Identify the substance that is reduced in the reaction between copper(II) ion and magnesium.
Cu2+ + Mg → Cu + Mg2+
Cu2+
Mg
Cu
Mg2+
Gaining oxygen is an example of...
oxidation
reduction
In a redox reaction, the species reduced
gains electrons and is the oxidizing agent
loses electrons and is the oxidizing agent
loses electrons and is the reducing agent
gains electrons and is the reducing agent
Mg → Mg2+ + 2e–
In a reaction, copper is reduced; its number of electrons has:
Increased
Decreased
Remained Constant
Varies Randomly
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
In a redox reaction, spectator ions...
become oxidised
become reduced
remain unchanged
4Fe + 3O2 --> 2Fe2O3
