The table shows the melting points and boiling points of some hydrocarbons.
| Substance | Melting point (∘C^\circ\text{C}∘C) | Boiling point (∘C^\circ\text{C}∘C) |
|---|---|---|
| Methane | -182 | -161 |
| Propane | -188 | -42 |
| Hexane | -95 | 69 |
| Octadecane | 28 | 317 |
Which statement is correct at room temperature (20∘C20^\circ\text{C}20∘C)?
Propane is a liquid and hexane is a solid.
Methane is a gas and hexane is a liquid.
Propane is a gas and octadecane is a liquid.
Octadecane is a gas and methane is a solid.
27 exam-style questions on OCR GCSE Chemistry The particle model. Each one has a worked solution and a mark scheme showing where the marks go.