1.

An example for autocatalysis is

Answer»

oxidation of NO to `NO_(2)`
oxidation of `SO_(2)` to `SO_(3)`
decomposition of `KClO_(3)` to KCl and `O_(2)`
oxidation of oxalic ACID by ACIDIFIED `KMnO_(4)`

Solution :`2KMnO_(4)+5H_(2)C_(2)O_(4)+3H_(2)SO_(4)rarr K_(2)SO_(4)+2MnSO_(4)+8H_(2)+10CO_(2)`
The pink colour of `KMnO_(4)` disappears slowly on TREATING it with oxalic acid, but therate of disappearance of colour factens after SOMETIME due to the formation of `Mn^(2+)` ions which acts as autocatalyst for the REACTION.


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