CHM203

1. The backbone of an organic molecule is __________

2. 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.

3. Tautomers which differ from each other only in the location of a hydrogen atom and a double bond are called ____________

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

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

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

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

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

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

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

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

12. The types of geometric isomers are trans and __________

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

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

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

16. 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 ____________

17. Cyclohexane has _______ fewer hydrogens than nhexane.

18. Down the group, electronegativity

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

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

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

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

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

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

25. Fused benzenoid hydrocarbon with three benzene rings is ________

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

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

28. Oxidation of naphthalene under controlled condition yields ___________

29. Reduction of benzene is by __________ of benzene.

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

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

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

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

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

35. Inductive effect is a type of ____________ effect

36. Fused benzenoid hydrocarbons with two benzene rings is _________

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

38. 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 ____________

39. An example of Isolated Benzenoid Hydrocarbon is __________

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

41. The dehydrohalogenation of alkyl halides yields __________

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

43. Another name for methyl benzene is __________

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

45. Hydrogen no - bond resonance is otherwise called _____________

46. The cannonical forms of  benzene were proposed by _____________

47. Unbranched isomer has higher _________ than branched isomer

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

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

50. The parent compound of polynuclear hydrocarbons is ___________