Question detail
In Test for oxygen, which answer best matches the evidence for hydrogen gas?
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. garden evidence: lighted splint gives a squeaky pop
- B. garden distractor: an observation from a different test is used
- C. garden distractor: the answer gives a conclusion without evidence
- D. garden distractor: the response describes a measurement rather than identification
Answer
The correct answer is garden evidence: lighted splint gives a squeaky pop. It matches hydrogen gas because the evidence is lighted splint and the expected result is squeaky pop.
Explanation
The correct option is garden evidence: lighted splint gives a squeaky pop. This is correct because lighted splint is the evidence expected for hydrogen gas, and squeaky pop is the result that supports the conclusion. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Confusing Gas Tests
Students often confuse the test for oxygen with the test for hydrogen, thinking both involve a lighted splint.
Remember that the test for oxygen uses a glowing splint, which relights, while hydrogen is tested with a lighted splint that makes a squeaky pop.
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