JAMB - Chemistry (1982 - No. 43)

Which of the following processes NOT lead to a chemical change?

Strirring iron in sulphur (IV) acid

Stirring sodium carbonate in water

Stirring glucose in concentrated sulphur (IV) acid

Mixing sulphur (IV) acid with potassium carbonate

Titrating an acid against base

Stirring Na₂CO₃ in water does not lead to a chemical change