Consider the reactions (A) `H_(2)O_(2)+ 2HI to I_(2)+2H_(2)O` (B) `HOCl + H_(2)O to H_(3)O^(+)+ Cl^(-) + O_(2)` Which of the following statements is correct about `H_(2)O_(2)` with reference to these reactions ? Hydrogen perioxide is …......... .A. an oxidising agent in both (A) and (B)B. an oxidising agent in (A) and reducing agent in (B)C. a reducing agent in (A) and oxidising agent in (B)D. a reducing agent in both (A) and (B)

Consider the reactions (A) `H_(2)O_(2)+ 2HI to I_(2)+2H_(2)O` (B) `HOC

1.	Consider the reactions (A) `H_(2)O_(2)+ 2HI to I_(2)+2H_(2)O` (B) `HOCl + H_(2)O to H_(3)O^(+)+ Cl^(-) + O_(2)` Which of the following statements is correct about `H_(2)O_(2)` with reference to these reactions ? Hydrogen perioxide is …......... .A. an oxidising agent in both (A) and (B)B. an oxidising agent in (A) and reducing agent in (B)C. a reducing agent in (A) and oxidising agent in (B)D. a reducing agent in both (A) and (B)
Answer» Correct Answer - B The rule of thumb for oxidising-reducing hebaviour of `H_(2)O_(2)` is :` H_(2)O_(2) ` acts as a reducing agent if `O_(2)` is evolved and `H_(2)O_(2)` acts as an oxidising agent if `O_(2)` is not evolved. Thus, in reaction (A), `H_(2)O_(2)` acts as an oxidising agent since `O_(2)` is not evolved but in reaction (B), it acts a reducing agent because `O_(2)` is evolved , i.e., option (b) is correct.

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