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Question

During decomposition of H2O2, it undergoes:
  1. oxidation
  2. redox reaction
  3. reduction
  4. disproportionation

A
oxidation
B
redox reaction
C
reduction
D
disproportionation
Solution
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The decomposition reaction of H2O2 is as follows:
2H2O22H2O+O2

This is a disproportionation reaction as oxidation state of O changes from 1 to 2 and 0.

Hence, during decomposition of H2O2, it undergoes disproportionation.

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