A substance melts at −7 ∘C-7\,^\circ\mathrm{C}−7∘C and boils at 59 ∘C59\,^\circ\mathrm{C}59∘C. What state is it in at −20 ∘C-20\,^\circ\mathrm{C}−20∘C and at 80 ∘C80\,^\circ\mathrm{C}80∘C?
Solid, then gas
Solid, then liquid
Gas, then liquid
Liquid, then gas
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.