CBSE Class 11th Chemistry Notes for Chapter 8 Redox Reactions

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        UNIT 8 REDOX REACTIONS
 
OXIDATION: Loss of electron(s) by any species
REDUCTION: Gain of electron(s) by any species
OXIDISING AGENT: Acceptor of electron(s)
REDUCING AGENT: Donor of electron(s)
 
REDOX REACTIONS
A reaction in which oxidation and reduction takes place simultaneously is called a redox reaction.
 
OXIDATION NUMBER
It denotes the oxidation state of an element in a compound ascertained according to a set of rules formulated on the basis that electron in a covalent bond belongs entirely to more electronegative element.
 
TYPES OF REDOX REACTIONS
1. Combination reactions

  • In a combination reaction both the elements combining together to form a compound should be in elemental form.

2. Decomposition reactions

  • A decomposition reaction is the opposite of combination reaction. It leads to the breakdown of a compound into two or more components at least one of which must be in the elemental form.

3. Displacement reactions

  • In a displacement reaction, an ion (or an atom) in a compound is replaced by an ion (or an atom) of another element.

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