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Redox Reactions

What is Redox reaction ?


Chemical reaction involving oxidation and reduction processes are called redox reaction. Oxidation may be defined as the process in which a species(atom,molecule or ion) increases oxidation number by losing one or more of electrons.
The substance undergoing oxidation is called reducing agent. Reduction, on the other hand, is a process in which a species(atom, molecule or ion) decreases oxidation number by gaining one or more electrons. The species undergoing reduction is called oxidising agent. Neither oxidation nor reduction can take place alone. These are complementary process and occur side by side. Redox reaction can, thus , be termed as the chemical reaction involving transference of electrons from reducing agent to oxidising agent.

Some examples of redox reactions are as follows :

1. Zn(s) power 0  + Cu(aq) power 2+  -------> zn 2+ power  (aq) + Cu(s) power 0

2. I2(s) power 0 + 10HNO3 (l) power +5------> 2HIO Power (+5) + 10NO2 Power (+4) + 4H20

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Related study material:

Oxidation and Reduction Reactions
Simple Redox Reaction 

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