Question

Identify the physical property that can help to check the purity of a substance.

• A. Atmospheric pressure
• B. Melting and boiling point
• C. Homogeneity
• D. Both Atmosphericpressure and Homogeneity

Answer 1

The correct option is B

Melting and boiling point

A pure substance has a fixed melting point or boiling point at constant pressure. The purity of a substance can be tested by checking its melting or boiling point. If a substance is impure, its melting and boiling point will change.