CH-1645
Tests for gases
Chemistry · Secondary 4 · Easy · Tests for gases
In an experiment, a student tests the gas produced at the anode during electrolysis of acidified water. Which test and observation correctly identify oxygen gas?
- Test with damp red litmus; it turns blue
- Insert a glowing splint; it relights
- Bubble through limewater; it turns milky
- Insert a lighted splint; a pop sound is heard
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