Question

In which of the following reaction water acts as oxidising agent :

Answer 1

Here, water is oxidising carbon and self gets reduced.
Hence, water is acting as an oxidizing agent here.
In option (A), water is acting as an reduction agent as $F_2$ is getting reduced. Similarly in option (D) also, it is acting as an reducing agent as $C{l}_2$ is getting reduced here.
In option (C), there is no change in oxidation number.