Oxidation and Reduction
Chemistry ⇒ Redox Reactions and Electrochemistry
Oxidation and Reduction starts at 10 and continues till grade 12.
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See sample questions for grade 10
Assign the oxidation number of sulfur in H2SO4.
Balance the following redox reaction in acidic medium: Fe2+ + Cr2O72- → Fe3+ + Cr3+
Explain what is meant by the term 'oxidation number'.
Explain why the reaction between hydrogen and fluorine to form hydrogen fluoride is a redox reaction.
Explain why the reaction: Zn + 2HCl → ZnCl2 + H2 is a redox reaction.
Identify the oxidizing agent in the following reaction: 2H2 + O2 → 2H2O.
In the context of redox reactions, what does the acronym OIL RIG stand for?
In the reaction: 2Fe3+ + 2I- → 2Fe2+ + I2, which species is oxidized?
In the reaction: 2H2O2 → 2H2O + O2, what is the change in oxidation number of oxygen?
In the reaction: 2K + 2H2O → 2KOH + H2, what is the oxidation number of potassium in KOH?
In the reaction: 2Mg + O2 → 2MgO, which element is oxidized?
In the reaction: 2Na + 2H2O → 2NaOH + H2, which element is reduced?
In the reaction: 2Na + Cl2 → 2NaCl, which element is reduced?
In the reaction: C + O2 → CO2, what is the oxidation number of carbon in CO2?
In the reaction: Fe2+ + Cu2+ → Fe3+ + Cu+, which species is oxidized?
State the change in oxidation number of Mn in the reaction: 2MnO4- + 5H2C2O4 + 6H+ → 2Mn2+ + 10CO2 + 8H2O.
What is the oxidation number of nitrogen in NH3?
