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. As evidence of oxygen
- B. As evidence of carbon dioxide
- C. As evidence of hydrogen
- D. As evidence of chlorine
Answer
The correct answer is As evidence of hydrogen. It matches hydrogen gas because the evidence is lighted splint and the expected result is squeaky pop.
Explanation
The correct option is As evidence of hydrogen. 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
Common Mistake in Hydrogen Test
Students often confuse the test for hydrogen with the test for oxygen, thinking both use a lighted splint.
Remember that the hydrogen test specifically uses a lighted splint to produce a squeaky pop, while the oxygen test uses a glowing splint to relight.
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