Question

In a basic medium, H₂O₂ exhibits which of the following reactions?

(A) \[\ce{Mn^{2+} -> Mn^{4+}}\]

(B) \[\ce{I2 -> I^-}\]

(C) \[\ce{PbS -> PbSO4}\]

Choose the most appropriate answer from the options given below.

Options

• (A), (C) only

• (A), (B) only

• (A) only

• (B) only

Answer 1

(A), (B) only

Explanation:

Possible reactions in the basic medium are:

\[\ce{Mn^{2+} + H2O2 -> Mn^{4+} + 2OH^-}\]

\[\ce{I2 + H2O2 + 2OH^- -> 2I^- + 2H2O + O2}\]

\[\ce{PbS -> PBSO4}\] is possible in acidic medium

\[\ce{PbS + 4H2O2 -> PbSO4 + 4H2O}\]