Chemistry 5070 · O Level · Water

Water — practice question

Which statement regarding water is correct?

  • ADistillation is used to remove insoluble impurities from the domestic water supply.
  • BWater containing impurities turns anhydrous copper(II) sulfate blue.
  • CWater containing impurities turns cobalt(II) chloride paper blue.
  • DWater containing impurities boils at $100^{\circ}\text{C}$.

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI