Question

The pH values of certain familiar substances are given below:
Analyze the data in the table and answer the following questions:
(a) Which substances are acidic in nature?
(b)Which substances are basic in nature?

Substances	pH values
Lemon juice	2.2-2.4
Tomato juice	4.1
Coffee	4.4-5.5
Household ammonia	12.0

Answer 1

On $pH$ scale, if the $pH$ value is less than $7$ then the species is acidic and if the value of $pH$ is greater than $7$ then the species will be basic.

(A) Here $pH$ values of Lemon juice, tomato juice, Coffee are less than $7$. Thus they are acidic in nature.

(b) The $pH$ value of Household ammonia is greater than $7$ thus it is basic in nature.