Chemistry 0620 · IGCSE · Solids, liquids and gases

Solids, liquids and gases — practice question

Iodine is shown in two separate physical states. In state 1, iodine is made up of $\text{I}_2$ molecules that are far apart and moving quickly at random. In state 2, iodine is made up of $\text{I}_2$ molecules that are tightly packed together and only vibrate. Iodine can change directly from state 2 to state 1. Which row for state 2 and for the change from state 2 to state 1 is correct?

  • Astate 2: liquid; the change from state 2 to state 1: evaporation
  • Bstate 2: liquid; the change from state 2 to state 1: sublimation
  • Cstate 2: solid; the change from state 2 to state 1: evaporation
  • Dstate 2: solid; the change from state 2 to state 1: sublimation

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