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Question

Which of the following process is not used in the concentration of H2O2?
  1. Sublimation
  2. Fractional crystallization
  3. Distillation under reduced pressure
  4. Evaporation on a water bath

A
Evaporation on a water bath
B
Fractional crystallization
C
Sublimation
D
Distillation under reduced pressure
Solution
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Sublimation is not involved in concentration of H2O2.
Concentration of Hydrogen peroxide involves the following steps:
1. Evaporation of solution to obtain 30% solution.
2. Distillation under pressure to get 90% pure solution.
3. Fractional Distillation to get 100% pure H2O2.

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