. 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.