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CHM 332 > Quiz 3.2 > Flashcards

Quiz 3.2 Flashcards

1
Q

Which of the following compounds gives an infrared spectrum with peaks in the ranges of 3200-3650 (strong, broad) and 1600-1640 cm-1 (medium); but does not have peaks at 1630-1820 (strong)?

A

C. 3

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2
Q
A

C. 3

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3
Q

Which of the following bonds undergoes stretching at the highest frequency?
A. O-H
B. C-H
C. C=O
D. CºC

A

A. O-H

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4
Q

Which of the following bonds (circled) gives the weakest absorbance in the infrared spectrum?

A

B. 2

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5
Q

Which of the following bonds gives rise to a strong, broad, absorbance at approximately 3200-3650 cm-1 in the infrared spectrum?
A. C=O
B. O-H
C. C=C
D. C-H

A

B. O-H

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6
Q
A

C. 3

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7
Q

Which of the following bonds gives rise to a strong absorbance at approximately 1630-1820 cm-1 in the infrared spectrum?
A. C=O
B. C-O
C. C=C
D. CºC

A

A. C=O

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8
Q

Which of the following bonds (circled) gives a very weak or no stretching absorption in the infrared spectrum?

A

A. 1

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9
Q

Which of the following laws relates the frequency of a stretching vibration to the masses and spring constant of a simple harmonic oscillator?
A. Pan’s law
B. Hooke’s law
C. Peter’s law
D. Barrie’s law

A

B. Hooke’s law

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10
Q

Which of the following carbon-carbon bonds undergoes stretching at the highest frequency?
A. sp3 C - sp3 C
B. alkene sp2 C - sp2 C
C. arene sp2 C - sp2 C
D. CºC

A

D. CºC

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11
Q

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?
A. radio waves
B. ultraviolet
C. infrared
D. visible

A

B. ultraviolet

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12
Q
A

D. 4

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13
Q

Which of the following bonds gives the weakest peak in the infrared spectrum for a stretching vibration?

A

B. 2

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14
Q
A

A. 1

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15
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 3200-3650 cm-1 (strong), but does not have peaks at 1630-1820 or 1000-1250 cm-1
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

A. alcohol

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16
Q

Which of the following bonds undergoes stretching at the highest frequency?
A. C=O
B. C-O
C. C=C
D. C-C

A

A. C=O

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17
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 3200-3650 cm-1 (strong), but does not have peaks at 1630-1820 or 1000-1250 cm-1
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

A. alcohol

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18
Q
A

A. 1

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19
Q
A

B. 2

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20
Q
A

B. 2

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21
Q

Which of the following processes takes place upon absorption of infrared radiation?
A. bond vibration
B. electron excitation
C. nuclear spin flip
D. electron spin flip

A

A. bond vibration

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22
Q
A

A. 1

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23
Q

What range of wavelengths corresponds to the infrared region of the electromagnetic spectrum?
A. 200-400 nm
B. 400-700 nm
C. 2.5-50 mm
D. 2-10 mm

A

C. 2.5-50 mm

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24
Q

What range of wavelengths corresponds to the infrared region of the electromagnetic spectrum?
A. 200-400 nm
B. 400-700 nm
C. 2.5-50 mm
D. 2-10 mm

A

C. 2.5-50 mm

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25
Q

Which of the following relationships is not valid as applied to infrared spectroscopy?
A. wavenumber = 1/l (in cm)
B. DE = h n
C. DE = l n
D. n = 4.12 Ö(K/m)

A

C. DE = l n

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26
Q

Which of the following bonds (circled) gives a very weak or no stretching absorption in the infrared spectrum?

A

A. 1

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27
Q
A

A. 1

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28
Q

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-1 in the infrared spectrum?
A. CºC
B. C=O
C. C=C
D. C-H

A

D. C-H

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29
Q

Which of the following bonds (circled) vibrates at the highest frequency?

A

D. 4

30
Q

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the longest wavelength?
A. radio waves
B. ultraviolet
C. infrared
D. visible

A

A. radio waves

31
Q

Which of the following relationships is not valid as applied to infrared spectroscopy?
A. wavenumber = 1/l (in cm)
B. DE = h n
C. DE = l n
D. n = 4.12 Ö(K/m)

A

C. DE = l n

32
Q

Which of the following bonds gives the weakest peak in the infrared spectrum for a stretching vibration?

A

B. 2

33
Q
A

B. 2

34
Q
A

A. 1

35
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm-1 (strong), but does not have peaks 3200-3650 at 1630-1820 or cm-1?
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

C. ether

36
Q

Which of the following bonds undergoes stretching at the highest frequency?
A. O-H
B. C-H
C. C=O
D. CºC

A

A. O-H

37
Q

Which of the following bonds gives rise to a medium strength absorbance at approximately 1600-1680 cm-1 in the infrared spectrum?
A. C-H
B. C-C
C. C=C
D. CºC

A

C. C=C

38
Q

What are the units of wavenumber, , in infrared spectroscopy?
A. cm
B. cm-1
C. Jmol-1
D. none, wavenumber is a dimensionless quantity

A

B. cm-1

39
Q

Which of the following carbon-carbon bonds undergoes stretching at the highest frequency?
A. sp3 C - sp3 C
B. alkene sp2 C - sp2 C
C. arene sp2 C - sp2 C
D. CºC

A

D. CºC

40
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1630-1820 cm-1 (strong, broad), but does not have peaks at 3200-3650 or 1000-1250 cm-1
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

B. aldehyde or ketone

41
Q
A

B. 2

42
Q

Which of the following bonds gives rise to a strong, broad, absorbance at approximately 3200-3650 cm-1 in the infrared spectrum?
A. C=O
B. O-H
C. C=C
D. C-H

A

B. O-H

43
Q

Which of the following bonds gives rise to a medium strength absorbance at approximately 1600-1680 cm-1 in the infrared spectrum?
A. C-H
B. C-C
C. C=C
D. CºC

A

C. C=C

44
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1630-1820 cm-1 (strong, broad) and 1000-1250 cm-1; but does not have peaks at 3200-3650 cm-1?
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

D. ester

45
Q

Which of the following bonds gives rise to a strong absorbance at approximately 1630-1820 cm-1 in the infrared spectrum?
A. C=O
B. C-O
C. C=C
D. CºC

A

A. C=O

46
Q

What are the units of wavenumber, , in infrared spectroscopy?
A. cm
B. cm-1
C. Jmol-1
D. none, wavenumber is a dimensionless quantity

A

B. cm-1

47
Q

Which of the following compounds gives an infrared spectrum with a peak in the range of 1630-1820 cm-1 (strong peak), but does not have peaks at 3200-3650 or 1000-1250 cm-1?

A

B. 2

48
Q
A

C. 3

49
Q

Which of the following compounds gives an infrared spectrum with peaks in the ranges of 3200-3650 (strong, broad) and 1600-1640 cm-1 (medium); but does not have peaks at 1630-1820 (strong)?

A

C. 3

50
Q

Which of the following bonds undergoes stretching at the highest frequency?
A. C=O
B. C-O
C. C=C
D. C-C

A

A. C=O

51
Q

Which of the following compounds gives an infrared spectrum with a peak in the range of 1630-1820 cm-1 (strong peak), but does not have peaks at 3200-3650 or 1000-1250 cm-1?

A

B. 2

52
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1630-1820 cm-1 (strong, broad) and 1000-1250 cm-1; but does not have peaks at 3200-3650 cm-1?
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

D. ester

53
Q
A

B. 2

54
Q
A

A. 1

55
Q

What is required for a bond to give an infrared absorption?
A. a change in bond length during vibration
B. a change in bond angle during vibration
C. a change in bond dipole during vibration
D. a change in reduced mass during vibration

A

C. a change in bond dipole during vibration

56
Q

Which of the following laws relates the frequency of a stretching vibration to the masses and spring constant of a simple harmonic oscillator?
A. Pan’s law
B. Hooke’s law
C. Peter’s law
D. Barrie’s law

A

B. Hooke’s law

57
Q
A

A. 1

58
Q

Which of the following processes takes place upon absorption of infrared radiation?
A. bond vibration
B. electron excitation
C. nuclear spin flip
D. electron spin flip

A

A. bond vibration

59
Q
A

D. 4

60
Q

What is required for a bond to give an infrared absorption?
A. a change in bond length during vibration
B. a change in bond angle during vibration
C. a change in bond dipole during vibration
D. a change in reduced mass during vibration

A

C. a change in bond dipole during vibration

61
Q

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the longest wavelength?
A. radio waves
B. ultraviolet
C. infrared
D. visible

A

A. radio waves

62
Q

Which of the following bonds (circled) vibrates at the highest frequency?

A

D. 4

63
Q

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-1 in the infrared spectrum?
A. CºC
B. C=O
C. C=C
D. C-H

A

D. C-H

64
Q

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?
A. radio waves
B. ultraviolet
C. infrared
D. visible

A

B. ultraviolet

65
Q
A

C. 3

66
Q

Which of the following bonds (circled) gives the weakest absorbance in the infrared spectrum?

A

B. 2

67
Q
A

B. 2

68
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1630-1820 cm-1 (strong, broad), but does not have peaks at 3200-3650 or 1000-1250 cm-1
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

B. aldehyde or ketone

69
Q

Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm-1 (strong), but does not have peaks 3200-3650 at 1630-1820 or cm-1?
A. alcohol
B. aldehyde or ketone
C. ether
D. ester

A

C. ether

70
Q
A

A. 1

CHM 332 (12 decks)

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