Question

Which property of a substance checks its purity?

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

Answer 1

The correct option is B

Melting and boiling point

Correct option is 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 i.e. it contains traces of another substance, the melting and boiling point of that substance will change.