CH-705
Tests for gases
Chemistry · Secondary 3 · Easy · Tests for gases
A student reacts dilute hydrochloric acid with calcium carbonate and collects the gas produced. Which test and observation correctly identify the gas?
- Bubble the gas through limewater; it turns milky.
- Pass the gas over damp red litmus; it turns blue.
- Hold a glowing splint in the gas; it relights.
- Bring a lighted splint near the gas; it burns with a squeaky pop.
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