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1% H2O2  obtained is extracted with water. The steps involved in its concentration are given below.  I) Evaporation under reduced pressureII) Distillation under reduced pressureIII) FreezingThe proper sequence of above steps is

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a

I, II, III

b

II, I , III

c

I, III, II

d

II, III, I

answer is A.

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Detailed Solution

After I – 30% H2O2  is obtainedAfter II – 85%  H2O2 is obtainedAfter III – needle shaped crystals of pure  H2O2 are obtained
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1% H2O2  obtained is extracted with water. The steps involved in its concentration are given below.  I) Evaporation under reduced pressureII) Distillation under reduced pressureIII) FreezingThe proper sequence of above steps is