Consider the reaction of water with `F_(2)` and suggest, in terms of oxidation and reduction, which species are oxidised/reduced.

Explanation

The reaction of water with `F_(2)` is as follows.
`underset("Oxidising agent ")(2overset(0)F_(2)(g))+underset("Reducing agent")(2overset(+1)(H_(2))overset(-2)O(l))to4overset(+1)(H^(+))(aq)+4overset(-1)(F^(-))(aq)+overset(0)(O_(2))(g)`
Thus, in this reaction water acts as a reducing agent because it undergoes oxidation to form `O_(2)` gas. `F_(2)` is reduced to `F^(-)` ions and thus acts as an oxidising agent.