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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