Essential Chemistry for IGCSE - Particles And Purification (Section 10 - No. 40)
Which of the following is NOT a way to identify a substance's purity?
Melting point determination
Boiling point determination
Chromatography
Color change upon heating
Explanation
While color change can be an indicator of a reaction, it does not determine purity. Melting and boiling point, and chromatography give results used to check purity.
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