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6. A product is insoluble in water and contains water soluble impurities- which of these techniques is most appropriate for extracting the product?

  • Seperation
  • Distillation
  • Recrystallisation
  • Drying

7. Conditions & reactant for elimination of halogenoalkanes?

  • Hot, ethanolic, reflux, sodium hydroxide
  • Hot, aqueous, reflux, acid catalyst
  • Hot, ethanolic, distilled, sodium hydroxide
  • Warm, aqueous, potassium hydroxide, distillef

8. Conditions for nucleophilic substitution with ammonia?

  • Cold, ethanolic
  • Warm, ethanolic
  • Cold, aqueous
  • Warm, aqueous

9. Which of these could be a product of base hydrolysis of an ester?

  • OH ion
  • Ethanoate ion
  • Propanoic acid
  • Ethanal

10. What are the conditions for nucleophilic substitution: halogenoalkanes with cyanide?

  • Cold, distilled, aqueous
  • Warm, ethanolic, reflux
  • Warm, aqueous, reflux
  • Warm, acid catalyst, reflux

11. What is a use of quaternary ammonium salts?

  • Fertilisers
  • Bases
  • Cationic surfactants
  • Plasticisers

12. Which of these is most likely to undergo elimination?

  • 2-bromo-2-methylbutane
  • 1-bromopropane
  • 1,2-dibromopropane
  • 2-bromo-3-methylbutane

13. How do you form alkyl hydrogen sulfates?

  • Alkenes with cold, conc sulfuric acid
  • Alkenes with warm, conc sulfuric acid
  • Halogenoalkanes with warm, conc sulfuric acid
  • Halogenoalkanes with warm, ethanolic sulfuric acid

14. Which of these is NOT a use of an ester?

  • Flavourings
  • Added to plastics to make them more rigid
  • Solvents
  • Placticisers

15. What is washing?

  • Adding water to an aqueous solution to remove non-polar impurities
  • Taking an organic solvent which the product is more soluble in than water, shaking it, and running off the aqueous layer in a separating funnel
  • Adding a liquid to impure product and shaking to remove impurities
  • Adding a drying agent to an aqueous solution to remove water

16. Which of these is the strongest base?

  • tetramethylamine
  • diethylamine
  • phenylamine
  • ammonia

17. Conditions and reactants for acid hydrolysis of an ester?

  • Strong aid, distilled
  • Strong acid, reflux
  • Dilute acid, reflux
  • Dilute acid, distilled

18. What is the charge on the nitrogen atom in quaternary ammonium salts?

  • +5
  • 0
  • +1
  • -1

19. Carbon-halogen bond enthalpy increases...?

  • Right to left along the period
  • Down the group
  • Up the group
  • Left to right along the period

20. Which of these halogenoalkanes will react the slowest?

  • Fluoroethane
  • Iodoethane
  • Chloroethane
  • Bromoethane