Oxygen Quiz
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5 questions, one answer each
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1. What is the correct test for oxygen gas?
- A. Bubble the gas through limewater
- B. Insert a glowing splint into the gas
- C. Insert a lit splint into the gas
- D. Test with damp litmus paper
2. What is the positive result when testing for oxygen?
- A. A squeaky pop
- B. The splint relights
- C. Limewater turns cloudy
- D. No visible change
3. Why does the glowing splint relight in a tube of oxygen but not in ordinary room air?
- A. Room air contains no oxygen at all
- B. Oxygen concentration in the tube is much higher, providing enough to reignite combustion
- C. The tube makes the splint hotter
- D. Oxygen reacts directly with the wood to produce fire
4. A student inserts a splint that has completely stopped glowing (gone cold) into a tube of pure oxygen. What is the most likely outcome?
- A. The splint relights instantly
- B. Nothing happens, because there is no heat left to reignite it
- C. The tube explodes
- D. Limewater in the tube turns cloudy
5. A gas sample relights a glowing splint. Which other property would this gas most likely have?
- A. It supports combustion
- B. It reacts with limewater to give a white precipitate
- C. It produces a squeaky pop with a lit splint
- D. It has a sharp, choking smell