Chemistry 0620 · IGCSE · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

When several drops of water are placed onto a solid, E, its colour changes from blue to pink. What is E?

  • Aanhydrous cobalt(II) chloride
  • Banhydrous copper(II) sulfate
  • Chydrated cobalt(II) chloride
  • Dhydrated copper(II) sulfate

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