The table shows the melting points and boiling points of four halogens.
| Halogen | Melting point in ∘C^\circ\mathrm{C}∘C | Boiling point in ∘C^\circ\mathrm{C}∘C |
|---|---|---|
| fluorine | -220 | -188 |
| chlorine | -101 | -34 |
| bromine | -7 | 59 |
| iodine | 114 | 184 |
A sample of each halogen is kept at −50 ∘C-50\,^\circ\mathrm{C}−50∘C. Which row gives the states of fluorine, chlorine and bromine, in that order, at this temperature?
gas, gas, liquid
gas, liquid, solid
gas, liquid, liquid
gas, solid, solid
106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.