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6. What are the reaction conditions for acid hydrolysis?
- cold aqueous NaOH and reflux
- hot aqueous HCl and reflux
- cold aqueous HCl and reflux
- hot aqueous NaOH and reflux
7. What observations would you record during the bromination of phenol?
- Solution changes colour from orange to brown
- Orange colour disappears -> colourless solution
- Orange colour disappears - white ppt formed
- Solution changes colour from orange to green
8. What are the reaction conditions for reaction of potassium dichromate and a primary alcohol?
- heat under reflux
- RTP
- heat under reflux, distill immediately
9. What conditions and reagents would you use for transesterification?
- conc NaBH4 and reflux
- methanol and NaOH catalyst
- methanol and KOH catalyst
- conc HCl and reflux
10. How would you carry out a test to determine whether a compound was an aldehyde or a ketone?
- Heat gently with tollens reagent, silver mirror = aldehyde
- Heat gently with tollens reagent, silver mirror = ketone
- Heat gently with 2,4-DNPH - orange precipitate = aldehyde
- Oxidise with K2Cr2O7/H2SO4 - colour change of solution = ketone
11. What are the reaction conditions and reagents for bromination of phenol?
- Bromine water, RTP
- HBr + RTP
- HBr + 50 degrees temp
- Bromine water, halogen carrier
12. How would you reduce an aldehyde to form a primary alcohol?
- add NaBH4 and reflux
- add NaBH4 and methanol
- add conc HCl and tin
- add NaBH4 and ethanol
13. 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
14. 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
15. What are the conditions for a coupling reaction?
- KOH catalyst and methanol
- aqueous alkaline conditions
- concentrated NaOH catalyst
- aqueous acidic conditions
16. How would you carry out a test to distinguish a carboxylic acid from a ketone?
- Add solid carbonate - fizzing as CO2 given off = aldehyde/ketone
- Oxidise with K2Cr2O7/H2SO4 - colour change = carboxylic acid
- React with 2,4-DNPH, orange precipitate = aldehyde/ketone
- Heat gently with tollens reagent, silver mirror = carboxylic acid
17. What are the reaction conditions and reagents for the mononitration of benzene?
- HCl catalyst, HNO2 reagent, temp 50 degrees
- H2SO4 catalyst, HNO3 reagent, reflux
- H2SO4 catalyst, HNO3 reagent, temp 50 degrees
- HCl catalyst, HNO3 reagent, reflux