A pure substance is cooled from 120 ∘C120\,^\circ\mathrm{C}120∘C to 20 ∘C20\,^\circ\mathrm{C}20∘C. Its boiling point is 90 ∘C90\,^\circ\mathrm{C}90∘C and melting point is 40 ∘C40\,^\circ\mathrm{C}40∘C. Which state changes occur?
Condensation followed by freezing
Condensation only
Freezing followed by condensation
Freezing only
84 exam-style questions on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.