CHM203

1. Reduction of benzene is by __________ of benzene.

2. A change in molecular structure which affect the reactivity of the molecule by changing the electron distribution is called __________

3. Hydrogenation of benzene at higher temperature and under pressure yields ________

4. The presence of an aromatic ring in a compound is detected by ____________

5. The dehydrohalogenation of alkyl halides yields __________

6. A side reaction that occurs during substitution reactions of alkyl halides is _________

7. Hydrogen no - bond resonance is otherwise called _____________

8. The benzenoid hydrocarbons in which two or more benzene rings are fused together at ortho position in such a way that each pair of rings shares rings shares two carbons are called ---------- benzenoid hydrocarbon.

9. The parent compound of polynuclear hydrocarbons is ___________

10. In terms of steric effect,  conformational isomer is __________ more stable.

11. Fused benzenoid hydrocarbon with three benzene rings is ________

12. The definition of an acid as a proton donor was given by ________

13. Branched chain hydrocarbons have lower __________ than their straight chain isomers.

14. The substitution of an acyl group into an aromatic ring by the reaction with an acid chloride in the presence of Lewis acid is called ____________

15. The type of tautomerism which involves a shift in interatomic distance within a molecule, without the separation of any atom from the rest of the molecule , as an intermediate stage is called ____________

16. The extent to which acids transfer a proton to a standard base determines __________

17. Fused benzenoid hydrocarbons with two benzene rings is _________

18. Cyclohexane has _______ fewer hydrogens than nhexane.

19. A benzenoid hydrocarbon in which two benzene rings are fused together at the ortho position is called ____________

20. In keto-enol tautomers, the tautomer that predominates is __________

21. In terms of aromatization, naphthalene has ___________ π electrons

22. There are ---------- resonance structures of benzene

23. Bleaching powder provides chlorine which oxidizes ethanol to _________.

24. The method of reduction of the carbonyl group of ketone produced by Friedel -crafts acylation is ------------ reduction.

25. The major product in the nitration of nitrobenzene is ____________

26. The cannonical forms of  benzene were proposed by _____________

27. Unbranched isomer has higher _________ than branched isomer

28. Down the group, electronegativity

29. The reaction in which aryl halides are formed from aromatic amines is called _________

30. In terms of steric effect _________ geometric isomer is more stable.

31. The number or π-electrons in benzene is _____________

32. The amount of substance dissolved in a certain amount of solvent is referred to as ___________

33. The process by which benzene and its derivatives are extracted from petroleum is called ___________

34. The effect arising from the spatial interactions between the groups in a compound is called _____________

35. Another name for methyl benzene is __________

36. The types of geometric isomers are trans and __________

37. The backbone of an organic molecule is __________

38. Reduction of benzene using Nickel at 425-525K and 25atm yields __________

39. Naphthalene has ________ number of resonance hybrid structures

40. The influence of the inductive effect on acid strength is almost negligible after the __________ carbon in the chain.

41. The rule that states that in a dehydrohalogenation reaction of alkyl halides, the major product will be the product that has the more alkyl groups attached to the resultant carbon - carbon double bond is __________ rule.

42. Sulphonation of benzene yields ___________

43. The method of reduction of the carbonyl group of ketone produced by Friedel - craft is __________

44. Two factors that affect the boiling point of a substance are ________ and _________

45. Solubility of branched isomers is __________ than that of straight chain isomers

46. The most widely used method for the preparation of alkyl halides is from __________

47. For halogen derivatives of aromatic compounds, boiling point ---------- with increase in atomic size of the halogen atom.

48. Oxidation of naphthalene under controlled condition yields ___________

49. The stronger an acid the ___________ is its conjugate base

50. The E2 reactions of alkyl halides are favoured by the use of __________