First slide
Water and Heavy water
Question

H2O + H2\large \rightleftharpoons H3O+ + OH. In this reaction water acts as
I ) Bronsted Acid II) Bronsted Base III) Amphoteric oxide

Easy
Solution

Proton Acceptor - Bronsted base

Proton Donor - Bronsted acid

\therefore H2O acts as both acid and base

the compounds which shows both acidic and basic character are said to be amphoteric in nature.

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