. The concentration of a sample of acidified aqueous

H2O2 can be estimated by titrating against a standard solution of KMnO4 added from a burette. Under these conditions, H2O2 is oxidized to O2.

Which of the following statements is/are correct?

(A) The end-point is when the colour changes from colourless to purple.

(B) Dilute H2SO4 is a suitable acid for use in this titration.

(C) Each mole of H2O2 accepts one mole of electrons.

(D) [Mn(H2O)6]2+ and Cr2+ is formed in the reaction.




Best Answer

Ans: B

Sol: At end point, Mn2+ forms colourless solution and each mole of H2O2 accepts 2 moles of electrons.

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