Dehydration of alcohols Quiz
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5 questions, one answer each
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1. What is the role of concentrated sulfuric acid in dehydrating ethanol?
- A. Catalyst
- B. Oxidising agent
- C. Nucleophile
- D. Reducing agent
2. Which carbocation forms from propan-2-ol during dehydration?
- A. CH₃CH₂CH₂⁺
- B. CH₃CH⁺CH₃
- C. (CH₃)₃C⁺
- D. CH₃CH₂⁺
3. In the mechanism, the oxygen atom first reacts with:
- A. OH⁻
- B. Br⁻
- C. H⁺
- D. H₂O
4. Why is poly(ethene) from bio-ethanol described as avoiding crude oil?
- A. The ethanol comes from fermentation of plant sugars, so the monomer is not derived from crude oil
- B. The polymerisation step needs no catalyst
- C. Poly(ethene) is biodegradable
- D. The ethene is made by cracking
5. A student distils cyclohexene (boiling point 83 °C) from cyclohexanol (161 °C). Why does the cyclohexene distil first?
- A. It has stronger hydrogen bonds
- B. It is denser than the alcohol
- C. It is more polar
- D. It has a lower boiling point because it cannot form hydrogen bonds