Question detail
Which answer avoids confusing hydrogen 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. Oxygen test uses limewater
- B. Oxygen test uses a glowing splint
- C. Oxygen test produces a squeaky pop
- D. Oxygen test bleaches damp litmus paper
Answer
The correct answer is Oxygen test uses a glowing splint. It matches hydrogen gas because the evidence is lighted splint and the expected result is squeaky pop.
Explanation
The correct option is Oxygen test uses a glowing splint. Use this as an exam check: if the observation is not squeaky pop, the conclusion about hydrogen 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
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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