CH-690
Tests for gases
Chemistry · Secondary 3 · Easy · Tests for gases
A student wants to confirm the presence of sulfur dioxide gas produced in a reaction. Which test should be used?
- Bubble the gas through limewater; a white precipitate forms.
- Pass the gas into moist blue litmus paper; it turns red.
- Bubble the gas through acidified potassium manganate(VII); it turns colourless.
- Hold a glowing splint in the gas; it relights.
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