Chemistry 9701 · AS & A Level · Chemical bonding

Chemical bonding — practice question

The table compares some properties of four substances. Which substance might be potassium iodide?

  • Amelting point of solid $-66\,^{\circ}\text{C}$; electrical conductivity when molten: poor
  • Bmelting point of solid $-39\,^{\circ}\text{C}$; electrical conductivity when molten: good
  • Cmelting point of solid $680\,^{\circ}\text{C}$; electrical conductivity when molten: good
  • Dmelting point of solid $1600\,^{\circ}\text{C}$; electrical conductivity when molten: poor

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