Cracking and Alkenes Quiz
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5 questions, one answer each
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1. What is the purpose of cracking hydrocarbons?
- A. To make crude oil heavier
- B. To break large hydrocarbons into smaller, more useful ones
- C. To remove all carbon from hydrocarbons
- D. To turn alkenes into alkanes
2. What is the general formula for an alkene?
- A. CₙH₂ₙ₊₂
- B. CₙH₂ₙ
- C. CₙH₂ₙ₋₂
- D. CₙHₙ
3. What happens when bromine water is added to an alkene?
- A. It stays orange
- B. It turns blue
- C. It decolourises (goes from orange to colourless)
- D. It produces a white precipitate
4. C₁₂H₂₆ is cracked to produce C₈H₁₈ and another product. What is the other product?
- A. C₄H₈
- B. C₄H₁₀
- C. C₃H₆
- D. C₄H₆
5. Why is the production of alkenes through cracking important for industry, beyond fuel supply?
- A. Alkenes are used as monomers to manufacture polymers
- B. Alkenes are burned as the cleanest possible fuel
- C. Alkenes are less reactive so are safer to store
- D. Alkenes cannot be used for anything except fuel