How water act both as on oxidising and reducing agent? Give examples.
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Solution
Water acts as an oxidizing agent in the presence of a strong electron donor(strong reducing agent) whereas it acts as a reducing agent in the presence of strong electron acceptor(strong oxidizing agent).
Water act as a reducing agent in presence of fluorine. Fluorine acts as an oxidizing agent and oxidizes water to ozone or oxygen.
3F2+3H2O→6HF+O3
2F2+2H2O→4HF+O2
Water act as an oxidizing agent in presence of lithium. Lithium acts as a reducing agent which reduces water to hydrogen.