Chemistry 0620 · IGCSE · Identification of ions and gases

Identification of ions and gases — practice question

Solid X is heated strongly. The solid’s colour changes from blue to white. What is solid X?

  • Aanhydrous cobalt(II) chloride
  • Bcalcium carbonate
  • Chydrated copper(II) sulfate
  • Dlead(II) bromide

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