Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases H2O2 acts as a reducing agent in acid medium ?

  1. A

    MnO4

  2. B

    Cr2O72

  3. C

    SO32

  4. D

    KI

    Join Our Infinity Learn's Learning Program!

    FREE Lve Classes, PDFs, Solved Questions, PYQ's, Mock Tests, Practice Tests, and Test Series!

    +91

    Verify OTP Code (required)


    I agree to the terms and conditions and privacy policy.

    Solution:

    With MnO4 in acidic medium, H2O2 acts as a reducing agent.

    2MnO4+6H++5H2O22Mn2++8H2O+5O2

    H2O2 oxidizes SO32 to SO42, I to I2 and  Cr2O72 to CrO3 in acidic medium.

    SO32+H2O2SO42+H2O

    2I+2H++H2O22H2O+I2

    Cr2O72+2H+4H2O22CrO5+5H2O (perchromate) 

    Chat on WhatsApp

      Join Infinity Learn Regular Class Program!

      Sign up & Get instant access to FREE PDF's, solved questions, Previous Year Papers, Quizzes and Puzzles!

      +91

      Verify OTP Code (required)





      I agree to the terms and conditions and privacy policy.