Question: What are acid, basic and amphoteric substance. Give one example of each substance. Answer. Acid and base can be defined in different ways. Acidic substance: According to Lowery Bronsted, a substance which acts as proton donor is called acidic substance. Basic substance: A substance which acts as proton acceptor is called basic substance. For example , HCl donates the proton to water , so HCl is an acid and water accepts proton, so water is a base. Amphoteric substance: A substance which act as either proton donor or proton acceptor depending upon the condition is called amphoteric substance. For example Water is an amphoteric substance as it acts as a base (proton acceptor) when it reacts with HCl while acts as an acid (proton donor) when reacts with ammonia. Question: What is Bronsted –lowery acid base theory? Give examples. Answer. J. Bronsted and T. Lowery independently proposed acid base theory....
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