1.

Given below are the two reactions of H_(2)O_(2). Mark the correct statement which follows. (i) 2KMnO_(4) + 3H_(2)SO_(4) + 5H_(2)O_(2) to K_(2)SO_(4) + 2MnSO_(4) + 8H_(2)O + 5O_(2) (ii)2Cr(OH)_(3) + 4NaOH + 3H_(2)O_(2) to 2Na_(2)CrO_(4) + 8H_(2)O

Answer»

(i) Show oxidising nature of `H_(2)O_(2)` and (ii) shows reducing nature of `H_(2)O_(2)`.
In (i) `H_(2)O_(2)` acts as a reducing agent and in (ii) it acts as an oxidising agent.
In both (i) and (ii), `H_(2)O_(2)` acts as an oxidising agent.
In both (i) and (ii), `H_(2)O_(2)` acts as a reducing agent.

Solution :In (i) `H_(2)O_(2)` REDUCES `KMnO_(4)` to `MnSO_(4)` and is oxidised to `O_(2)`.
In (ii)`H_(2)O_(2)` oxidises `Cr(OH)_(3)` to `Na_(2)CrO_(4)` and is reduced to `H_(2)O`.


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