Fluorine reacts with ice and results in the change:

H2O(s) + F2(g) HF(g) + HOF(g)


Justify that this reaction is a redox reaction.

Let us write the oxidation number of each atom involved in the given reaction above its symbol as:



Here, we have observed that the oxidation number of F increases from 0 in F2 to + 1 in HOF. Also, the O.N. dereases from 0 in F2 to -1 in HF. Thus, in the above reaction, F is both oxidised and reduced. Hence, the given reaction is a redox reaction.


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