Question

pH value shows the numeric value of 

(a) quality of chemical used for developing photographic negatives

(b) analysing the nature of solution acidic or basic

(c) analysing the intensity of an earthquake 

(d) analysing for checking purity of milk

Answer 1

(b) analysing the nature of solution acidic or basic

The pH scale measures the acidity or basicity of a solution.

The solution with a pH less than 7 is said to be acidic while. the solution with the pH greater than 7 is basic or alkaline.

The pure water has a pH value 7. The logarithm of the reciprocal of hydrogen ion concentration in moles per measured by pH scale from 0 to 14.