Alkanes conformations halogenation mechanisms, alkenes electrophilic addition Markownikoff rule ozonolysis polymerization - One Line Questions

1. The structure of the repeating unit in polypropene is: — (-CH2-CH(CH3)-)
2. In the staggered conformation of ethane, the dihedral angle between adjacent C-H bonds is: — 60 degrees
3. The anti-Markownikoff addition of HBr to 1-butene will primarily yield: — 1-bromobutane
4. The addition of Br2 to ethene forms: — 1,2-dibromoethane
5. In the electrophilic addition of HBr to 2-methylbut-2-ene, the major product is: — 2-bromo-2-methylbutane
6. The IUPAC name of the product of ozonolysis of 2,4,4-trimethylpent-1-ene followed by reductive workup is: — 2,2-dimethylpropanal and methanal
7. Free radical polymerization of alkenes is initiated by: — Free radical initiators
8. Polymerization of alkenes involves: — Joining of many monomer units
9. Alkenes undergo which type of reaction primarily? — Addition reactions
10. Ozonolysis of cyclohexene followed by oxidative workup yields: — Adipic acid
11. The first step in the electrophilic addition of HBr to an alkene is: — Protonation of the alkene to form a carbocation
12. Which conformation of cyclohexane is the most stable? — Chair conformation
13. Which of the following is a propagation step in the free radical bromination of ethane? — CH3CH2• + Br2 -> CH3CH2Br + Br•
14. The intermediate formed during the addition of bromine to ethene is a: — Bromonium ion
15. The anti-Markownikoff addition of HBr to an alkene in the presence of peroxides proceeds via: — Free radical intermediate
16. Free radical chlorination of cyclohexane primarily produces: — Chlorocyclohexane
17. Which type of polymerization is typically followed by ethene to form polyethene? — Addition polymerization
18. Which of the following is the most stable conformation of ethane? — Staggered conformation
19. The addition of halogens to alkenes is an example of: — Electrophilic addition
20. The interconversion of chair conformations of cyclohexane is called: — Ring flipping
21. In the chair conformation of cyclohexane, axial and equatorial positions are: — Non-equivalent
22. In the ozonolysis of propene followed by reductive workup (e.g., with Zn/H2O), the products are: — Propanal and methanal
23. The electrophilic addition of water to ethene in the presence of an acid catalyst yields: — Ethanol
24. The monomer unit in polypropylene is: — Propene
25. The order of reactivity of halogens in free radical halogenation of alkanes is: — F2 > Cl2 > Br2 > I2
26. Markownikoff's rule states that in the addition of HX to an unsymmetrical alkene, the hydrogen atom adds to the carbon atom that has: — More hydrogen atoms
27. The mechanism of addition of H2O to alkenes in the presence of acid catalyst involves: — Attack by water molecule on carbocation
28. The termination step in free radical halogenation involves: — Combination of two free radicals
29. Why is free radical iodination of alkanes not synthetically useful? — The reaction is reversible and the reverse reaction is favored
30. The process of formation of a polymer from monomers is called: — Polymerization
31. Which reagent is used for reductive workup after ozonolysis of alkenes? — Zn/H2O
32. The addition of HBr to propene in the presence of peroxides follows: — Anti-Markownikoff's rule
33. Which of the following carbocations is the most stable? — Tertiary carbocation
34. Which of the following is the most stable free radical? — Tertiary radical
35. Free radical halogenation of alkanes proceeds via which mechanism? — Free radical chain mechanism
36. The reaction of an alkene with KMnO4 under cold, dilute, alkaline conditions leads to: — Diol formation
37. Which of the following is a Ziegler-Natta catalyst used in alkene polymerization? — Titanium tetrachloride and triethylaluminium
38. Which of the following is an example of a polymer derived from an alkene? — Polyvinyl chloride
39. Which of the following is an example of condensation polymerization? — Nylon-6,6
40. The process of breaking down larger hydrocarbon molecules into smaller, more useful ones is called: — Cracking
41. In the free radical chlorination of propane, which hydrogen is most likely to be substituted? — Tertiary hydrogens
42. The product of oxidative cleavage of 2,3-dimethylbut-2-ene using hot KMnO4 is: — Two molecules of propanone
43. Ozonolysis of 2-methylbut-2-ene followed by reductive workup yields: — Propanone and methanal
44. The initiation step in the free radical chlorination of methane involves: — Homolytic cleavage of Cl-Cl bond by UV light
45. Electrophilic addition to alkenes involves the attack of an electrophile on the: — Pi bond
46. The eclipsed conformation of ethane is less stable than the staggered conformation due to: — Torsional strain
47. Which type of strain is primarily responsible for the difference in stability between eclipsed and staggered conformations of ethane? — Torsional strain
48. Which of the following is a common application of polyethene? — Plastic bags
49. Ozonolysis of an alkene is used to determine: — The position of double bond
50. Which type of strain is present in the boat conformation of cyclohexane that is absent in the chair conformation? — Steric strain (flagpole interaction)
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