Transition and InnerTransition Elements - Result Question 42

####43. Fe3+ is reduced to Fe2+ by using

(2015 Adv.)

(a) H2O2 in presence of NaOH

(b) Na2O2 in water

(c) H2O2 in presence of H2SO4

(d) Na2O2 in presence of H2SO4

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Answer:

Correct Answer: 43. (a,b)

Solution:

  1. H2O2 is alkaline medium acts as reducing agent, reduces Fe3+ to Fe2+. In acidic medium the same H2O2 oxidises Fe2+ to Fe3+.


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