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JEE Main202118 Mar 2021Evening ShiftChemistryHydrogenActual

In basic medium, H 2 O 2 exhibits which of the following reactions? (A) Mn 2 + → Mn 4 + (B) I 2 → I - (C) PbS → PbSO 4 Choose the most appropriate answer from the options given below :

Options

  1. A(A),(C) only
  2. B(A) only
  3. C(B) only
  4. D(A), (B) only

Correct answer

D. (A), (B) only

Step-by-step solution

In basic medium, oxidising action of H 2 O 2 . Mn 2 + + H 2 O 2 → Mn + 4 + 2 OH - In basic medium, reducing action of H 2 O 2 I 2 + H 2 O 2 + 2 OH - → 2 I - + 2 H 2 O + O 2 In acidic medium, oxidising action of H 2 O 2 PbS ( s ) + 4 H 2 O 2 ( aq ) → PbSO 4 (   s ) + 4 H 2 O ( l ) Hence correct option ( 4 ) .

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