Question detail
For Identification of common gases, which option uses the correct Chemical analysis evidence for chlorine 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. It turns blue
- B. It turns red
- C. It bleaches white
- D. It turns green
Answer
The correct answer is It bleaches white. It matches chlorine gas because the evidence is damp litmus paper and the expected result is bleaches.
Explanation
The correct option is It bleaches white. This response is stronger than the distractors because it keeps the test, observation, and interpretation in the correct order for chlorine gas. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Confusing Chlorine Test with Other Tests
Students often confuse the chlorine test with the tests for hydrogen, oxygen, and carbon dioxide.
To fix this, students should focus on the specific method used for the chlorine test, which involves using damp litmus paper that bleaches when chlorine is present.
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