organic chemistry test bank chapter 3 (part b)
TRANSCRIPT
Organic Chemistry Test Bank – Chapter 3 (Part B)
In every slide, you will find a question with 2 – 5 choices.
The answers of the questions will be in the last slide, so don’t forget to write your answers (To check them 💪).
*** You can use the periodic table anytime 😊.
1. The only metal below that would NOT make an acceptable catalyst for hydrogenation of an alkene is
A. Ni.
B. Na.
C. Pt.
D. Pd.
2. Which of the following will form 2 acetaldehyde molecules on ozonolysis?
A. 1-pentene.
B. 2-pentene.
C. 1-butene.
D. 2-butene.
***Note: Do not worry about the name of the aldehyde, think about the number of the products.
3. Which of the following reagents will form 1-propanol from propene?
A. BH3, OH− / H2O2.
B. Pt / C.
C. H2O / H+.
D. KMnO4.
4. Which of the following alkenes gives a main product different from the products of the other three in reactions with hydrogen chloride?
A. -
B. -
C. -
D. -
5. Which of the following alkenes gives a main product different from the products from the others in reactions with hydrogen chloride?
A. -
B. -
C. -
D. -
6. The addition of O3 / Zn • H+ to a terminal alkene (e.g.: hex-1-ene) is a method of preparing:
A. Two ketones.
B. An aldehyde and a ketone.
C. A diol.
D. Two aldehydes.
7. When HBr reacts with propene, Br is being added in a rate-determining step.
A. True.
B. False.
8. When propene reacts with HBr, it gives rise to:
A. Allyl bromide.
B. Isopropyl bromide.
C. 1-bromopropane.
D. 3-bromopropane.
9. What is the major organic product obtained from the following reaction?
A. 1.
B. 2.
C. 3.
D. 4.
10. Name the following compound (try it yourself without a clue):
A. 1.
B. 2.
C. 3.
D. 4.
11. Which of the following concepts explains Markovnikov’s rule as applied to the addition of HBr to propene?
A. The relative stability of carbocations.
B. The nucleophilicity of bromide anion.
C. The acidity of HBr.
D. The Aufbau principle.
12. Alkenes can be oxidized by the help of a powerful oxidizing agent, acidified:
A. Potassium magnate.
B. Sodium magnate.
C. Calcium magnate.
D. Calcium carbonate.
13. If hydrogen and alkene are passed over finely divided nickel (Ni), it gives off:
A. Alcohol.
B. Alkane.
C. Aldehyde.
D. Ketone.
14. The reagent(s) required to complete the following reaction is:
A. H2O / NaOH.
B. H2O / HBr.
C. Br2 / H2O.
D. Br2 / CCl4.
15. Which of the following statements about the hydrogenation of alkenes is not true?
A. The reaction involves reduction of an alkene.
B. The reaction can be catalyzed by nickel.
C. The reaction involves substitution.
D. None of the above.
16. The product of the following reaction is:
A. CH3CH2CH2OH.
B. CH3CHOHCH3.
C. CH3CH2CH3.
D. CH3CH2OCH3.
CH3CH=CH2 + H2O / H+→
17. The reagent(s) required to complete the following reaction is:
CH3CH=CH2 + H2O → CH3CH2CH2OHA. BH3, NaOH / H2O2.
B. Pt / C.
C. H2O / H+.
D. KMnO4.
18. The reaction type that convert unsaturated organic compounds into the saturated ones is:
A. Elimination reaction.
B. Addition reaction.
C. Substitution reaction.
D. Halogenation reaction.
19. Which of the following will form only Acetone (See the figure below) on ozonolysis?
A. 2-methyl-1-butene.
B. 2-methyl-2-butene.
C. 3-methyl-1-butene.
D. Cyclopentene.
20. One mole of alkene on ozonolysis gives two moles butanone (See the figure below). The alkene is:
A. 3,4-dimethyl-2-hexene.
B. 2,3-dimethyl-3-hexene.
C. 3,4-dimethyl-3-hexene.
D. 2,3-dimethyl-2-hexene.
E. 2,5-dimethyl-3-hexene.
***Note: Try to use the product only to reach the correct answer quickly.
21. Ozonolysis products of __________ are (CHO ― CHO) & (CH2CHO ― CH2CHO).
A. A.
B. B.
C. C.
D. D.
A B
C D
22. The following compound will give __________ on ozonolysis.
A. -
B. -
C. -
D. None of the above.
+ HCHO
23. Addition of HBr to 2-pentene gives:
A. 2-bromopentane only.
B. 3-bromopentane only.
C. 2-bromopentane & 3-bromopentane.
D. 1-bromopentane & 3-bromopentane.
24. The alkane that will give the same alcohol in reaction with (H2O / H+) & (BH3, NaOH / H2O2) is:
A. 2-butene.
B. 1-butene.
C. 2-methylpropene.
D. propene.
E. 1-hexene.
25. Which alkene will give rise to one type of aldehydes in ozonolysis?
A. 1-butene.
B. 2-butene.
C. Propene.
D. 2-methyl-1-propene.
26. The type of reaction(s) that take(s) place in Hydroboration & Ozonolysis is(are):
A. Addition Reaction.
B. Oxidation Reaction.
C. Reduction Reaction.
D. A + B.
E. A + C.
27. The halogenation reaction produces __________ product in a process called __________.
A. Cis, Cis-Addition.
B. Trans, Anti-Addition.
C. Trans, Syn-Addition.
D. Syn, Syn-Addition.
E. Syn, Anti-Addition.
28. The hydrogenation reaction produces __________ product in a process called __________.
A. Cis, Cis-Addition.
B. Trans, Anti-Addition.
C. Trans, Syn-Addition.
D. Syn, Syn-Addition.
E. Syn, Anti-Addition.
29. The compound with the most acidic C-H bond is:
A. Ethane.
B. Ethene.
C. 1-butyne.
D. 1-butanol.
30. The most acidic hydrogen in the following compound is:
A. A.
B. B.
C. C.
D. None of the above.
A B C
31. The final product of the following reaction is:
A. Haloalkane.
B. Alkene.
C. Ketone.
D. Enol.
E. A sodium Acetylide.
32. The reagent the complete the following reaction is:
A. 2Br2.
B. 2HBr.
C. 2H2O.
D. 2H2.
33. The reaction of ethyne with which of the following gives CH2Br-CHBrCl?
A. HCl, then HBr.
B. HCl, then Br2.
C. Cl2, then HBr.
D. Cl2, then Br2.
E. H2, then Br2.
34. The product C in the following reaction is:
A. -
B. -
C. -
D. -
B CHCl HI
35. When 2-butyne is reacted with dilute H2SO4 / HgSO4 the product formed is:
A. Butanol.
B. 2-butanol.
C. 2-butanone.
D. 2-butanal.
36. One mole of symmetrical alkene on ozonolysis gives two moles of aldehyde only:
A. True.
B. False.
37. Always, one mole of symmetrical alkene on ozonolysis gives one mole of aldehyde and one mole of ketone:
A. True.
B. False.
38. Which of the following compounds will only produce 2 aldehydes on ozonolysis?
A. 2-methyl-1-butene.
B. 2-methyl-2-butene.
C. 3-methyl-1-butene.
D. Cyclopentane.
39. The conjugated base of an alkyne is __________ stable than the conjugated base of an alkane.
A. More.
B. Less.
C. The same.
D. Can’t be determined.
40. The conjugated base of an alkyne is __________ than the conjugated base of an alkane.
A. Stronger.
B. Weaker.
C. The same as.
D. Can’t be determined.
41. To convert an alkyne to alkene, we use __________ reagent.
A. H2 / Pd.
B. H2 / Ni.
C. H2 / Pd (Lindlar’s catalyst).
D. We can’t do that.
42. The hydrogenation reaction of alkynes is an addition reaction.
A. True.
B. False.
43. What type of reaction do alkynes undergo across the triple bond?
A. Elimination reaction.
B. Substitution reaction.
C. Addition reaction.
D. Halogenation.
44. Which set of reagent(s) in correct order would accomplish the following transformation?
A. A.
B. B.
C. C.
D. D.
Choice I II
A Liquid NH3
B H+ HgSO4
C Br2
D H2 Pd (Lindlar’s catalyst)
Cis-1-pentene
45. Which of the following reactions follows Markovnikov’s Rule?
A. A.
B. B.
C. C.
D. D.
Choice I II
A Liquid NH3
B H+ HgSO4
C Br2
D H2 Pd (Lindlar’s catalyst)
1Cis-2-pentanone2-
The key answers
Question No. Answers Question No. Answers Question No. Answers Question No. Answers Question No. Answers
1. B 10. A 19. B 28. D 37. B
2. D 11. A 20. C 29. C 38. C
3. A 12. A 21. C 30. D 39. A
4. A 13. B 22. C 31. C 40. B
5. C 14. D 23. C 32. B 41. C
6. D 15. C 24. A 33. B 42. A
7. B 16. B 25. B 34. A 43. C
8. B 17. A 26. D 35. C 44. D
9. B 18. B 27. B 36. B 45. B