Question

how do we check purity of liquids?

Answer 1

by the process of distillation and chromatography 

Answer 2

Some of the methods to check purity of liquids are -----> (1). Filteration......... (2). Centrifugation......... (3). Evaporation........ (4). Distillation......... (5). Crystallization...... etc.... Through these methods, liquids get separated from harmful or contaminating substances hence resulting in purification.....