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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
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)
C. DE = l n
26
Which of the following bonds (circled) gives a very weak or no stretching absorption in the infrared spectrum?
A. 1
27
A. 1
28
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
D. C-H
29
Which of the following bonds (circled) vibrates at the highest frequency?
D. 4
30
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. radio waves
31
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)
C. DE = l n
32
Which of the following bonds gives the weakest peak in the infrared spectrum for a stretching vibration?
B. 2
33
B. 2
34
A. 1
35
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
C. ether
36
Which of the following bonds undergoes stretching at the highest frequency? A. O-H B. C-H C. C=O D. CºC
A. O-H
37
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
C. C=C
38
What are the units of wavenumber, , in infrared spectroscopy? A. cm B. cm-1 C. Jmol-1 D. none, wavenumber is a dimensionless quantity
B. cm-1
39
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
D. CºC
40
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
B. aldehyde or ketone
41
B. 2
42
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
B. O-H
43
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
C. C=C
44
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
D. ester
45
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. C=O
46
What are the units of wavenumber, , in infrared spectroscopy? A. cm B. cm-1 C. Jmol-1 D. none, wavenumber is a dimensionless quantity
B. cm-1
47
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?
B. 2
48
C. 3
49
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)?
C. 3
50
Which of the following bonds undergoes stretching at the highest frequency? A. C=O B. C-O C. C=C D. C-C
A. C=O
51
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?
B. 2
52
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
D. ester
53
B. 2
54
A. 1
55
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
C. a change in bond dipole during vibration
56
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
B. Hooke's law
57
A. 1
58
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. bond vibration
59
D. 4
60
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
C. a change in bond dipole during vibration
61
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. radio waves
62
Which of the following bonds (circled) vibrates at the highest frequency?
D. 4
63
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
D. C-H
64
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
B. ultraviolet
65
C. 3
66
Which of the following bonds (circled) gives the weakest absorbance in the infrared spectrum?
B. 2
67
B. 2
68
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
B. aldehyde or ketone
69
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
C. ether
70
A. 1

CHM 332 (12 decks)

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