Explain the different types of redox reactions with example.

1.	Explain the different types of redox reactions with example.
Answer» Solution :Redox reactions are classified into the following types: (i) Combination reactions: When two or more substances combine to form a single substance, the reactions are called combination reactions. Example: 2Mg + `O_(2) rarr` 2MgO (ii) Decomposition reactions: CHEMICAL reactions in which a compound splits up into two or more simpler substances are called decomposition reaction. Example: `2KClO_(3) rarr` 2KC1 + `3O_(2)` (iii) 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: `CuSO_(4)` + Zn `rarr ZnSO_(4)` + Cu (/v) Disproportionation reactions: The reactions in which an element undergoes SIMULTANEOUSLY both oxidation and reduction are called as disproportionation reactions. Example 2HCHO+`H_(2)OrarrCH_(3)OH`+HCOOH (v) 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))+Cu^(2+)rarrZn_((aq))^(2+)+Cu_((s))` Here Zn - oxidation, `Cu^(2+) - reduced`

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