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Question:

Fe3+ is reduced to Fe2+ by using:

H2O2 in presence of H2SO4

Na2O2 in presence of H2SO4

H2O2 in presence of NaOH

Na2O2 in water

Solution:

Fe3+ is reduced to Fe2+ by using either (A) H2O2 in presence of NaOH or (B) Na2O2 in water.