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6. What general formula do all alkenes have

  • CnH2n
  • CnHn
  • None
  • C2nHn

7. What is a disadvantage of producing ethanol through fermantation

  • The process needs a higher temperature to work
  • The process needs more complex equipment to work
  • It's not very concentrated
  • It comes from a non renewable source

8. What are Alkenes

  • Hydrocarbons with a single bond between the carbon atoms in their chains
  • Two Alkalis bonded together.
  • Hydrocarbons with a double bond between two of the carbon atoms in their chains
  • Alkalis

9. Which statement is true

  • The first two alkenes are ethane and propane
  • The first two alkenes are ethene and propene
  • All alkenes are ethene or propene
  • Ethene and propene are not alkenes

10. Why does the bromine water change?

  • Double bonds open up and form bonds with the bromine
  • The alkenes absorb the colour
  • The alkenes causes the Bromine water to evaporate away
  • Existing single bonds join with the bromine