Chemistry 0620 · IGCSE · Oxides

Oxides — practice question

Which of the following statements about sulfur dioxide or calcium oxide is correct?

  • ACalcium oxide is an acid.
  • BCalcium oxide turns thymolphthalein yellow.
  • CSulfur dioxide is a base.
  • DSulfur dioxide turns thymolphthalein colourless.

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