Write two reactions to explain amphoteric nature of water.

Fluorine is a strong oxidising agent, it oxidises H2O to O2 or O3. The reactions are as follows
2F2(g)+2H2O(l)O2(g)+4H+(aq)+4F-(aq)
3F2(g)+3H2O(l)O3(g)+6H+(aq)+6F-(aq)