Question detail
Which statement would earn credit for Explain why the litmus paper must be damp for the chlorine test.?
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. To enhance the color change
- B. To allow chlorine to dissolve and react
- C. To prevent the paper from burning
- D. To increase the surface area
Answer
The correct answer is To allow chlorine to dissolve and react. It matches chlorine gas because the evidence is damp litmus paper and the expected result is bleaches.
Explanation
The correct option is To allow chlorine to dissolve and react. The answer stays inside Identification of common gases by linking the observation to the conclusion instead of naming a substance without evidence. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Damp Litmus Paper Requirement
Students often forget that the litmus paper must be damp for the chlorine test, thinking that dry paper is sufficient.
Remember that chlorine gas needs moisture to react with the litmus paper, which allows it to bleach the paper effectively.
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