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6. Bromoethane reacts with KOH in aqueous conditions to form CH2=CH2?
7. Why do CFC's reach high into the atmosphere when chlorine gas doesn't?
- They are unreactive
- They are less dense
- They temporarily bind to carbon dioxide
- The ozone layer attracts them
8. Which of these reacts the fastest when attacked by a nucleophile?
- fluoroalkanes
- iodoalkanes
- chloroalkanes
- bromoalkanes
9. What are reactions started by ultraviolet light called?
- photochemical reactions
- cracking
- free radical substitutions
- nucleophilic substitution
10. Which gas leads to acid rain? (most commonly)
- Sulphur dioxide
- Hydrogen chloride
- Sodium hydroxide
- Potassium Nitrate
11. Which gases react in a catalytic converter to form less harmful products?
- carbon dioxide and carbon monoxide
- carbon monoxide and nitrous oxides
- carbon dioxide and water
- hydrogen and nitrous oxides
12. what reaction does aqueous conditions favour?
- nucleophilic subsitution
- nucleophilic elimination
13. Which nucleophilic substitution reaction has 2 steps instead of one?
- reactions with ammonia
- reactions with cyanide
- reactions with hydroxides
14. what is the reaction called when free radicals are produced?
- propagation reaction
- initiation reaction
- primary reaction
- preparation reaction
15. what reaction does anhydrous conditions favour?
- nucleophilic elimination
- nucleophilic subsitution
16. what products would be formed if a chlorine radical attacks a methane molecule?
- a hydrogen radical and chlromethane
- chloromethane and a hydrogen molecule
- a hydrogen chloride molecule and a methyl radical
- a chlorine radical and a methyl radical
17. What is formed when halogenoalkanes react with hydroxides?
18. What is the main concern with CFCs?
- They cause acid rain
- They are poisonous and cause breathing problems
- They are destroying the ozone layer
- They cause global warming
19. what is a free radical?
- a species which attracts a C delta + atom
- a particle with an unpaired electron
- a bond which splits equally
20. Which of these is not true about halogenoalkanes?
- they are often referred to as electron pair donors
- the C-halogen bond is polar because the halogen is much more electronegative than the carbon
- the delta + charge on the carbon makes it prone to attack from nucleophiles
- they are alkanes with at least one halogen atom in place of a hydrogen atom