Which of the following substance acts as an oxidizing as well as a reducing agent?
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answer is 1.
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Detailed Solution
NaNO2 (Sodium nitrite) acts both as oxidizing and as reducing agent because in it N atom is in +3 oxidation state (intermediate oxidation state)Oxidizing property:2NaNO2+2K+2H2SO4→Na2SO4+K2SO4+2NO+2H2O+I2Reducing property:H2O2+NaNO2⟶NaNO3+H2O.