Question detail
Which answer avoids confusing oxygen gas with another qualitative analysis result?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Identification of common gases
Question
- A. The splint extinguishes
- B. The splint burns brightly
- C. The splint glows and relights
- D. The splint produces a squeaky pop
Answer
The correct answer is The splint glows and relights. It matches oxygen gas because the evidence is glowing splint and the expected result is relights.
Explanation
The correct option is The splint glows and relights. Use this as an exam check: if the observation is not relights, the conclusion about oxygen gas is not properly supported. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Misinterpretation of Test Results
Students often confuse the glowing splint test for oxygen with the test for hydrogen, thinking both produce a similar sound.
Remember that a glowing splint relighting indicates oxygen is present, while a squeaky pop indicates hydrogen. Focus on the specific observations for each gas test.
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