Explain any three types of redox reaction with suitable examples.
Answers
Answer:
Redox reactions are matched sets: if one species is oxidized in a reaction, another must be reduced. Keep this in mind as we look at the five main types of redox reactions: combination, decomposition, displacement, combustion, and disproportion.
Explanation:
Redox reactions are classified into the following types:
(1) Combination reactions: When two or more substances combine to form a single substance, the reactions are called combination reactions. Example: 2Mg + O2 → 2MgO
(2) Decomposition reactions: Chemical reactions in which a compound splits up into two or more simpler substances are called decomposition reaction. Example: 2KClO3 → 2KCl + 3O2
(3) Displacement reactions: The reactions in which one ion or atom in a compound is replaced by an ion or atom of the other element are called displacement reactions. Example: CuSO4 + Zn → ZnSO4 + Cu
(4) Disproportionation reactions: The reactions in which an element undergoes simultaneously both oxidation and reduction are called as disproportionation reactions. Example: 2HCHO + H2O → CH3OH + HCOOH
(5) Competitive Electron transfer reactions: These are the reactions in which redox reactions take place in different vessels and it is an indirect redox reaction. There is a competition for the release of electrons among different metals. Example: Zn(s) + Cu2+ → Zn2+(aq) + Cu(s) Here Zn – oxidised; Cu2+ reduced...