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