Question detail
In Test for hydrogen, 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. A lighted splint gives a squeaky pop
- B. A glowing splint relights
- C. Limewater turns milky
- D. Damp blue litmus paper is bleached
Answer
The correct answer is A 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 A 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 hydrogen with the tests for oxygen, carbon dioxide, and chlorine.
Review the specific characteristics of each gas test, focusing on the unique observations associated with hydrogen, such as the squeaky pop sound when tested with a lighted splint.
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