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Redox Reactions

Question
CBSEENCH11006695

Define oxidising agents and reducing agents in terms of electronic concept ?

Solution
Oxidising agent: It is a substance which can accept one or more electrons from other substances. Thus, all those species (atom, ion or molecule) which undergo reduction are in fact, oxidising agents or oxidants, e.g. oxygen, nitric acid, permanganate ion etc. are oxidising agents.
open square brackets straight O close square brackets space plus space 2 straight e to the power of minus space space space rightwards arrow space space space straight O to the power of 2 minus end exponent
2 HNO subscript 3 space plus space 2 straight e to the power of minus space space rightwards arrow space space space 2 NO subscript 2 plus straight H subscript 2 straight O plus straight O to the power of negative 2 end exponent
MnO subscript 4 superscript minus space plus space 5 straight e to the power of minus space space rightwards arrow space space space Mn to the power of 2 plus end exponent space plus space 4 straight O to the power of 2 minus end exponent
Reducing agent: It is a substance which can readily lose one or more electrons to other substances. Thus, all those species (atom, ion or molecule) which undergo oxidation are in fact, reducing agents or reductant; e.g.sulphide ion, stannous ion, hydrogen peroxide etc. are reducing agents.
straight S to the power of 2 minus end exponent space space space rightwards arrow space space space straight S plus space 2 straight e to the power of minus
Sn to the power of 2 plus end exponent space space space rightwards arrow space space space Sn to the power of 4 plus end exponent space plus space 2 straight e to the power of minus
straight H subscript 2 straight O subscript 2 space rightwards arrow space space 2 straight H to the power of plus space plus space stack straight O subscript 2 space plus space 2 straight e to the power of minus with left parenthesis Acidic space medium right parenthesis below