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6. What type of reaction is the following?- C7H16 ----> C7H14 + H2

  • Reforming
  • Cracking
  • Isomerisation

7. What is an octane number?

  • The tendency of a fuel to auto ignite
  • The amount of octane found in the compund

8. An absorption spectra appears as black lines on a coloured background.

  • True
  • False

9. Does the entropy of this system decrease or increase? 6CO (g) + 13H2 (g) ------> C6H14 (l) + 6H2O (l)

  • Decrease
  • Increase

10. Why is ethoxyethane being considered as a possible alternative to petrol in car engines?

  • It produces less carbon monoxide because it contains more oxygen
  • It is cheaper
  • It produces more energy when it burns

11. Is the cycloalkane C5H10 aliphatic or aromatic?

  • Aliphatic
  • Aromatic

12. Which of these three compounds has the highest octane number?

  • cyclohexane
  • benzene
  • hexane

13. Structural isomers have different molecular formulae but the same structural formulae.

  • False
  • True

14. Which one of these is not a polluting gas from a vehicle engine?

  • Sulphur Oxides
  • Unburnt Hydrocarbons
  • Hydrogen
  • Carbon Monoxide

15. JJ Thompson discovered the....

  • nucleus
  • proton
  • electron
  • neutron