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Question

Fe3+ is reduced to Fe2+ by using

A
H2O2 in presence of NaOH
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B
Na2O2 in water
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C
H2O2 in presence of H2SO4
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D
Na2O2 in presence of H2SO4
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Solution

The correct options are
C H2O2 in presence of H2SO4
D Na2O2 in presence of H2SO4
It is necessary to use reagents in acidic medium to bring about the said reduction because, in basic medium, Fe3+ will be precipitated as Fe(OH)3 and hence the reaction will not happen.

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