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Question

Identify the oxidant and the reductant in the following reaction:
2FeCl2+H2O2+2HCl2FeCl3+2H2O


A
H2O2, HCl
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B
H2O2, FeCl2
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C
FeCl2, H2O2
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D
FeCl2, HCl
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Solution

The correct option is B H2O2, FeCl2
The given redox reaction is
2FeCl2+H2O2+2HCl2FeCl3+2H2O
+2 1 +3 2
A species which loses electron in a redox reaction is called as reducing agent/reductant.
2FeCl2(reductant)2FeCl3(oxidation half)
+2 +3
Here, FeCl2 is lossing reagent so it is a reductant.
A species which gains electron in a redox reaction is called as oxidising agent/oxidant.
H2O2(oxidant)2H2O(Reduction half)
1 2
Here, H2O2 is gaining electron so it is an oxidant.

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