Chapter 20 1 carbons in the following compound are chiral center

Chemistry: A Molecular Approach, 2e (Tro)

Chapter 20 Organic Chemistry

Multiple Choice Questions

1) Give the number of covalent bonds that a carbon atom can form.

A) 1

B) 2

C) 3

D) 4

E) 5

2) Identify the formula for an alkene.

A) CnH2n+2

B) CnH2n-2

C) CnH2n

D) CnH2n-4

E) CnH2n+4

3) Identify the formula for an alkane.

A) CnH2n+2

B) CnH2n-2

C) CnH2n

D) CnH2n-4

E) CnH2n+4

4) Identify the formula for an alkyne.

A) CnH2n+2

B) CnH2n-2

C) CnH2n

D) CnH2n-4

E) CnH2n+4

5) Nonsuperimposable mirror images are called ________.

A) structural isomers

B) achiral

C) diastereomers

D) enantiomers

E) racemic mixture

6) Molecules with the same formula but different structures are called ________.

A) structural isomers

B) achiral

C) diastereomers

D) enantiomers

E) racemic mixture

7) An equimolar mixture of two optical isomers is called a ________.

A) structural isomer

B) achiral

C) diastereomer

D) enantiomer

E) racemic mixture

8) How many of the carbons in the following compound are chiral center(s)?

A) 0

B) 1

C) 2

D) 3

E) 4 or more

9) How many of the carbons in the following compound are chiral center(s)?

A) 0

B) 1

C) 2

D) 3

E) 4 or more

10) Name the following compound.

A) 3-ethyl-3-methylhexane

B) 3-methyl-3-propylpentane

C) 3-ethyl-3-propylbutane

D) nonane

E) 2-ethylheptane

11) Name the following compound.

A) 4-methyl-4-propylpentane

B) 4,4-dimethylheptane

C) nonane

D) 4-propyl-4-methylpentane

E) 2-methyl-2-propylpentane

12) Name the following compound.

A) 2-methyl-3-methylhexane

B) heptane

C) 2,3-dimethylpentane

D) 3,4-dimethylpentane

E) 2,4-dimethylpropane

13) Which of the following names are correct?

A) 3-butyl-4-pentene

B) 3-ethyl-1-heptene

C) 3-etheneheptane

D) 5-ethyl-6-heptene

E) All of the above are correct.

14) Name the following compound.

A) 3-methyl-1-pentyne

B) 3-methyl-4-pentyne

C) 2-ethynebutane

D) 1-hexyne

E) 3-ethyl-1-butyne

15) Name the following compound.

A) 4-propyl-5-hexyne

B) 3-isopropyl-1-hexyne

C) 1-nonyne

D) 4-methyl-3-propyl-1-pentyne

E) 2-methyl-4-pentyne

16) Name the following compound.

A) 3-butyl-3-propyl-1-pentyne

B) 3-butyl-3-propyl-4-pentyne

C) 3-ethyl-3-propyl-1-heptyne

D) 5-ethyl-5-propyl-6-heptyne

E) 3-ethyl-3-butyl-1-hexyne

17) Which of the following names are correct?

A) 2-methyl-4-pentyne

B) 3-ethyl-1-butyne

C) 3-butyl-3-propyl-1-pentyne

D) 3-methyl-1-butyne

E) 3-ethyl-3-butyl-1-hexyne

18) Which of the following names are correct?

A) 3-methyl-5-heptyne

B) 2-ethyl-4-hexyne

C) 5-ethyl-2-hexyne

D) 4-butyl-1-pentyne

E) 5-methyl-2-heptyne

19) Which of the following compounds exhibit geometric isomerism?

A) CH2=CH-CH3

B) CCl2=CBr2

C) CH3-CH=CH-CH3

D) CCl2=CHBr

E) All of the above exhibit geometric isomerism.

20) Which of the following compounds exhibit geometric isomerism?

A) CH2=CH2

B) CH2=CCl2

C) CBr2=CHBr

D) CHCl=CHCl

E) (CH3)2C=CH-CH3

21) Write a balanced chemical reaction to represent the combustion of 2,2-dimethylpropane.

A) C5H12 + 8 O2 → 5 CO2 + 6 H2O

B) C3H8 + 5 O2 → 3 CO2 + 4 H2O

C) C5H12 + H2 → CH4 + 2 C2H6

D) C3H8 + H2 → CH4 + C2H6

E) 2 C3H8 + O2 → 3 CH4 + 2 H2O

22) Write a balanced chemical equation to represent the reaction of 3-ethyl-2-methylhexane with Br2.

A) C7H14 + Br2 → C7H12Br + HBr

B) C9H20 + Br2 → C9H19Br + HBr

C) C6H12 + Br2 → C6H10Br2 + H2

D) C9H18 + Br2 → C9H16Br2 + H2

E) C6H12 + Br2 → C6H11Br + HBr

23) Write the balanced chemical equation that represents the addition of Cl2 to CH3CH=CH2.

A) CH3CH=CH2 + Cl2 → CH3CHClCH3 + HCl

B) CH3CH=CH2 + Cl2 → CH3CCl=CHCl + H2

C) CH3CH=CH2 + Cl2 → CH3CHClCH2Cl

D) CH3CH=CH2 + 2 Cl2 → CH3CHCl2 + CH2Cl2

E) CH3CH=CH2 + 2 Cl2 → CH3CCl2CHCl2 + H2

24) Write the balanced chemical equation for the addition of 2 Br2 to CH3C≡CH.

A) CH3C≡CH + 2 Br2 → CH3CBr2CHBr2

B) CH3C≡CH + 2 Br2 → CH3CBr=CHBr

C) CH3C≡CH + 2 Br2 → CH3CH2CHBr2

D) CH3C≡CH + 2 Br2 → CH3CBr2CH3

E) CH3C≡CH + 2 Br2 → CH3CHBrCH2Br

25) Complete and balance the following addition reaction.

CH3C≡CCH3 + 2 Cl2 → ?

A) CH3C≡CCH3 + 2 Cl2 → CH3CCl2CCl2CH3

B) CH3C≡CCH3 + 3 Cl2 → 2 CH3CCl3

C) CH3C≡CCH3 + 2 Cl2 → 4 CH3Cl

D) CH3C≡CCH3 + 4 Cl2 → 4 CH2Cl2

E) CH3C≡CCH3 + Cl2 → CH3CHClCHClCH3

26) Write the balanced chemical equation for the catalytic hydrogenation (addition of H2) to

CH3CH=CHCH3.

A) CH3CH=CHCH3 + 2 H2 → 2 CH3CH3

B) CH3CH=CHCH3 + 3 H2 → CH3CH3 + 2 CH4

C) CH3CH=CHCH3 + 2 H2 → CH3CH2CH3 + CH4

D) CH3CH=CHCH3 + H2 → CH3CH2CH2CH3

E) CH3CH=CHCH3 + 4 H2 → 4 CH4

27) Write the balanced chemical equation for the catalytic hydrogenation (addition of H2) to

CH3C≡CH.

A) CH3C≡CH + H2 → CH3CH=CH2

B) CH3C≡CH + 2 H2 → CH3CH=CH2

C) CH3C≡CH + H2 → CH3CH2CH3

D) CH3C≡CH + 2 H2 → CH3CH2CH3

E) CH3C≡CH + H2 → CH2=C=CH2

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28) Complete and balance the following complete hydrogenation reaction.

CH3CH2C≡CCH3 + 2 H2 → ?

A) CH3CH2C≡CCH3 + 3 H2 → CH3CH2CH3 + CH3CH3

B) CH3CH2C≡CCH3 + 2 H2 → CH3CH2CH2CH2CH3

C) CH3CH2C≡CCH3 + 6 H2 → 5 CH4

D) 2 CH3CH2C≡CCH3 + 2 H2 → CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

E) CH3CH2C≡CCH3 + 2 H2 → CH3CH2CH2CH2CH3

29) Write the balanced chemical equation for the addition of HBr to CH2=CHCH2CH3.

A) CH2=CHCH2CH3 + HBr → CH3BrCH2CH2CH3

B) CH2=CHCH2CH3 + 2 HBr → 2 CH2BrCH3

C) CH2=CHCH2CH3 + 2 HBr → CH3Br + CH2BrCH2CH3

D) CH2=CHCH2CH3 + 4 HBr → 4 CH3Br

E) CH2=CHCH2CH3 + HBr → CH3CHBrCH2CH3

30) Name the following compound.

A) 2,5-dibromobenzene

B) 2,5-dibromocyclohexene

C) 1,4-dibromobenzene

D) 1,4-bromocyclohexene

E) 3,6-dibromobenzene

31) Name the following compound.

A) o-dibromobenzene

B) m-dibromobenzene

C) p-dibromobenzene

D) p-bromobenzene

E) none of the above

32) Name the following compound.

A) 2,3,5-trichlorobenzene

B) 1,3,4-trichlorobenzene

C) trichlorostyrene

D) 1,2,4-trichlorobenzene

E) 1,3,4-trichlorohexene

33) Which of the following compounds is an alcohol?

A) CH3CH2CH2CO2H

B) CH3-O-CH3

C) CH3CO2CH3

D) CH3CH2CH=O

E) CH2OH-CH2OH

34) Which of the following compounds is an aldehyde?

A) CH3CH2CH=O

B) CH3CH2CH2CO2H

C) CH3CO2CH3

D) CH3-O-CH3

E) CH2OH–CH2OH

35) Which of the following compounds is an ketone?

A) CH3CH2CH2CO2H

B)

C) CH3CH2NH2

D)

E)

36) Which of the following compounds is an carboxylic acid?

A)

B)

C)

D)

E)

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37) Which of the following compounds is an ester?

A)

B)

C)

D)

E)

38) Which of the following compounds is an ether?

A)

B)

C)

D)

E)

39) Which of the following compounds is ethanol?

A) C2H6

B) C2H5OH

C) CH3CO2H

D) CH3CO2CH3

E) CH3-O-CH3

40) Arrange the following in order from most oxidized to least oxidized.

A) II > I > III

B) III > II > I

C) III > I > III

D) I > II > III

E) II > I > III

41) Arrange the following in order from least oxidized to most oxidized.

A) II < I < III

B) III < I = II

C) III < I < II

D) I < II < III

E) I < III < II

42) Identify the most oxidized compound.

A) CH3CH2COOH

B) CH3CH2CHO

C) CH3CH2CH3

D) CH3CH2OCH3

E) CH3CH2CH2OH

43) Determine the products of the following reaction:

A)

B)

C)

D)

E)

44) Give the product for the dehydration of CH3CH2CH2OH.

A) CH3CH2CH2OCH2CH2CH3

B) CH3CH=CH2

C) CH3CH=CHCH3

D) CH3CH2CH=CH2

E) CH2=C=CH2

45) Determine the products of the following reaction:

A)

B)

C)

D)

E)

46) Determine the products of the following reaction:

A)

B)

C)

D)

E)