HALOALKANE AND HALOARENES
1. Write one essential condition for a molecule to show optical isomerism?
2. What is chirality & chiral centre ?
3. A racemic mixture can not rotate the plane of polarized light. Give reason ?
4. What is meant by meso- compounds ?
5. Chloroform is a chlorine compound but give no reaction with silver nitrate solution why ?
6. Alkyle halides though polar , are immiscible with water, why ?
7. Explain why is thionyl chloride method preffered for preparing alkyl chloride from alcohols ?
8. How will you obtain 1-chloropropane by using (1) HCL (g) (2) SOCL2 in p/o pyridine .?
9. Why haloarenes more stable than haloalkanes ?
10. Why do electrophilic substitution is ortho- & para- directing in haloarenes ?
11. Why a small amount of ethyl alcohol is added to chloroform bottles ?.
12. Why chloroform is stored in dark colored bottles ?
13. Why vinyle chloride is less reactive than methyl chloride?
14. Why is dehydrohalogenation reaction in haloalkanes termed as Beta – elimination ?
15. What are enantiomers ?How can they be identified ?
16. Explain, why the treatment of alkyle halides with aquous KOH leads to formation of alcohols,but in presence of alcoholic KOH alkenes are the major product ?
17. How DDT is prepared ? Write its uses ?
18. What is Iodoform test ? Explain its significance ?
19. What is saytzeff’s rule ? Explain with the help of suitable example?
20. Explain SN1 reactions with mechanism.What is thepreference order of two different alkyle halides to undergoes nucleophilic substitution reaction via SN1 mechanism ?
21. Explain SN2 reactions with mechanism.What is thepreference order of two different alkyle halides to undergoe nucleophilic substitution reaction via SN2 mechanism ?
22. Explain why the dipole moment of chlorobenzene is lower than that of cyclohexylchloride ?
23. How methyl bromide reacts with aq. KOH ? Give the mechanism and kinetics of reaction ?
24. How friedel craft alkylation differs from friedel craft acylation ?
25. Write two environmental effects of Freon’s ?
26. Haloarenes are in insoluble in water while soluble in benzene?
27. How do the products differ when ethyle bromide reacts seperatly with KNO3 & AgNO3 ? Name the products?
28. How do the products differ when ethyl bromide reacts seperatly with KCN & AgCN? Name the products ?
29. How does cholorobenzene reacts with methyl chloride in p/o sodium in anhydrous ether? What is the name of reaction ?
30. Benzyl chloride is more reactive than cholorobenzene towards nucleophilic substation reaction ?
31. With the help of ‘resonance ‘ show that aryl halides are less reactive than alkylhalides ?
32. Why use of choloroform as anesthetic is decreasing?
33. Write a short note on the following reactions
Ø Finkelstein rxn
Ø Wurtz –Fitting rxn
Ø Dehydrohalogenation rxn
Ø Gattermann rxn
Ø Sandmeyer’s reaction
Ø Friedel craft alkylation
Ø Fitting
Ø Hofmann ammonolysis rxn
Ø Ullmann rxn
Ø Riemer Tiemann rxn
Ø Iodoform rxn
Ø Balz- Schiemann rxn
Ø Sulphonation of haloarenes
Ø Wurtz rxn
Ø Nitration of Haloarenes
Ø Haloform rxn
Ø Hundsdiecker rxn
Ø Swartz rxn
Ø Carbylamine rxn
34. Convert
Ø Benzene to 2- chlorotolune
Ø Chlorobenzene to benzene
Ø Chlorobenzene to phenol
Ø Acetone to choloroacetone
Ø Iodobenzene to diphenyl
Ø Prop-1-ene to 1-bromopropane
Ø Chlorobenzene to salicyldehyde
Ø Butane to 1 chlorobutane
Ø Aniline to flurobenzene
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