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Question

Identify the oxidant and the reductant in the following reaction respectively:
2KMnO4+10KCl+8H2SO42MnSO4+6K2SO4+8H2O+5Cl2

A
KMnO4 & KCl
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B
KMnO4 & H2SO4
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C
MnSO4 & KMnO4
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D
KCl & KMnO4
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Solution

The correct option is A KMnO4 & KCl
The given redox reaction is
(+7)2KMnO4+(1)10KCl+8H2SO4(+2)2MnSO4+6K2SO4+8H2O+(0)Cl2.
Reduction half reaction
A species which gains electron in a redox reaction is called as oxidising agent/oxidant.
(+7)2KMnO4(oxidant)(+2)2MnSO4.
Here KMnO4 is gaining electron so it is an oxidant.

Oxidation half reaction
A species which looses electron in a redox reaction is called as reducing agent/reductant.
(1)10KCl(reductant)(0)5Cl2.
Here KCl is losing reagent so it is a reductant.


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