Question

how can we check whether substance is pure or not​

Answer 1

Explanation:

To determine if a substance is pure in school laboratories, we can check the substance's melting or boiling points or use chromatography (see Separation Techniques). A pure solid has a constant/fixed melting point. ie. it will melt completely at one temperature only.

Answer 2

to determine if a substance is pure in school laboratories,we can check the substances melting or boiling points or use chromatography.A pure soild has a fixed melting point.ie.it will melt completely at one temperature only.

PEASE MARK AS BRAINLIEST ANSWER