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6. What observations would you record reacting potassium dichromate with a primary alcohol?

  • Oxidising agent changes colour from yellow to orange
  • White precipitate formed
  • Oxidising agent changes colour from orange to green
  • Oxidising agent changes colour from orange to blue

7. How would you reduce an aldehyde to form a primary alcohol?

  • add conc HCl and tin
  • add NaBH4 and methanol
  • add NaBH4 and ethanol
  • add NaBH4 and reflux

8. How would you get an alicyclic amine?

  • react a halogenalkane with aqueous ethanolic ammonia
  • react a halogenalkane with HCl and tin under reflux
  • react nitrobenzene with HCl and tin under reflux
  • react nitrobenzene with nitrous acid below 10 degrees temp

9. What are the reaction conditions and reagents for halogenation of benzene?

  • HCl/HBr + RTP
  • HCl/HBr + heat under reflux
  • Halogen carrier + RTP
  • Halogen carrier + heat under reflux

10. What are the reaction conditions for reaction of potassium dichromate and a primary alcohol?

  • heat under reflux, distill immediately
  • heat under reflux
  • RTP

11. What are the reaction conditions and reagents for bromination of phenol?

  • HBr + 50 degrees temp
  • Bromine water, halogen carrier
  • Bromine water, RTP
  • HBr + RTP

12. What are the reaction conditions for alkaline hydrolysis?

  • hot aqueous NaOH and reflux
  • tin and conc HCl
  • hot aqueous HCl and reflux
  • hot water and reflux

13. How would you carry out a test to distinguish a carboxylic acid from a ketone?

  • Heat gently with tollens reagent, silver mirror = carboxylic acid
  • Add solid carbonate - fizzing as CO2 given off = aldehyde/ketone
  • React with 2,4-DNPH, orange precipitate = aldehyde/ketone
  • Oxidise with K2Cr2O7/H2SO4 - colour change = carboxylic acid

14. What are the reaction conditions and reagents for esterification using acid anhydrides?

  • RTP
  • concentrated HCl, heat gently
  • concentrated H2SO4, heat under reflux
  • concentrated HCl and tin

15. What are the reaction conditions for acid hydrolysis?

  • cold aqueous HCl and reflux
  • hot aqueous HCl and reflux
  • hot aqueous NaOH and reflux
  • cold aqueous NaOH and reflux

16. What are the reaction conditions and reagents for the mononitration of benzene?

  • HCl catalyst, HNO3 reagent, reflux
  • HCl catalyst, HNO2 reagent, temp 50 degrees
  • H2SO4 catalyst, HNO3 reagent, temp 50 degrees
  • H2SO4 catalyst, HNO3 reagent, reflux

17. What observations would you record during the bromination of phenol?

  • Solution changes colour from orange to brown
  • Orange colour disappears - white ppt formed
  • Solution changes colour from orange to green
  • Orange colour disappears -> colourless solution