The pH values of certain familiar substances are given below:

Analyse the data in the table and answer the following questions:

i) Which substances are acidic in nature?

ii) Which substances are basic in nature?

(i) A substance is treated as acidic in nature when its p^H falls below 7 i.e p^H < 7 in the table given in the question the only substance whose p^H <7 is Vinegar. Hence, Vinegar is acidic in nature.

(ii) A substance is treated as basic in nature when its p^H is above 7 i.e p^H > 7 in the table given in the question the substances whose p^H > 7 are Blood(slightly basic), Baking soda and Household ammonia. Hence, Blood, Baking soda and Household ammonia are basic in nature.