CH-1621
Tests for gases
Chemistry · Secondary 4 · Easy · Tests for gases
A student tests an unknown gas produced when hydrogen peroxide decomposes. Which pair of tests and observations correctly identifies oxygen gas?
- Insert a glowing splint; it relights.
- Bubble through limewater; limewater turns milky.
- Hold damp blue litmus; it turns red then bleaches.
- Apply a lighted splint; it pops.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.