Chlorine Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What kind of smell does chlorine gas have?
- A. Sweet and fruity
- B. Sharp and choking
- C. No smell at all
- D. Rotten eggs
2. What is used to test for chlorine gas?
- A. A lighted splint
- B. Damp blue litmus paper
- C. Limewater
- D. Silver nitrate solution
3. What happens to damp blue litmus paper when chlorine gas is present?
- A. It turns red only
- B. It turns red then is bleached white
- C. It turns blue permanently
- D. It has no effect
4. Why does chlorine turn litmus paper red before bleaching it?
- A. Chlorine cools the paper
- B. Chlorine dissolves in the water on the paper forming an acidic solution
- C. Chlorine reacts with the test tube
- D. Chlorine is itself red
5. A student tests an unknown gas: damp blue litmus paper turns red but is NOT bleached. What can they conclude?
- A. The gas is definitely chlorine
- B. The gas is likely an acidic gas but not chlorine
- C. The gas is definitely oxygen
- D. The gas is definitely carbon dioxide, confirmed