Testing for Saturation Quiz
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5 questions, one answer each
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1. What colour is bromine water before it reacts with an alkene?
- A. Colourless
- B. Orange
- C. Blue
- D. Green
2. What happens to bromine water when shaken with an unsaturated hydrocarbon?
- A. It stays orange
- B. It turns colourless
- C. It turns blue
- D. It turns cloudy white
3. A student shakes an unknown hydrocarbon with bromine water and it stays orange. What can be concluded?
- A. The hydrocarbon is an alkene
- B. The hydrocarbon is saturated (an alkane)
- C. The hydrocarbon is a polymer
- D. The hydrocarbon is a carboxylic acid
4. Which of the following is the general formula for an alkene?
- A. CnH2n+2
- B. CnH2n
- C. CnH2n-2
- D. CnHn
5. A sample from a cracking reaction is tested with bromine water and turns colourless. What does this tell you about the products of cracking in this sample?
- A. Only alkanes were produced
- B. At least one alkene (unsaturated hydrocarbon) is present
- C. The sample contains no hydrocarbons at all
- D. The sample is a pure alkane