Question 1

Which of the following relationships is not valid as applied to infrared spectroscopy?

Accepted Answer

A)  "wavenumber = 1/ λ\lambdaλ  (in cm) "
B)  " Δ\DeltaΔ E = h  υ\upsilonυ  "
C)  " Δ\DeltaΔ E =  λ\lambdaλ   υ\upsilonυ  "
D)  " υ\upsilonυ  = 4.12  √ \surd√ (K/ μ\muμ ) "

Question 2

Which of the following compounds gives a carbonyl bond absorption at the highest frequency?

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 3

What are the units of wavenumber, -1 C) J.mol-1 D) none, wavenumber is a dimensionless quantity" class="answers-bank-image d-inline" rel="preload" > , in infrared spectroscopy?

Accepted Answer

A)  cm
B)  cm-1
C)  J.mol-1
D)  none, wavenumber is a dimensionless quantity

Question 4

Which of the following compounds gives an infrared spectrum with a peak at ~1750 cm-1, but no significant peaks at 3000-3500 cm-1 or 1050-1250 cm-1? -1, but no significant peaks at 3000-3500 cm-1 or 1050-1250 cm-1?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 5

Examining the infrared spectrum of a compound allows us to determine the nature of the conjugated pi electron system in the compound.

Accepted Answer

A) True 
 B)False

Question 6

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?

Accepted Answer

A)  alcohol
B)  aldehyde or ketone
C)  ether
D)  ester

Question 7

The radio wave region of the electromagnetic spectrum would have sufficient energy to produce the following energy transition.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following compounds gives an infrared spectrum with peaks at 3300 cm-1 (sharp peak)  and 2150 cm-1 (sharp peak) ? -1 (sharp peak)  and 2150 cm-1 (sharp peak) ?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 9

The vertical axis on an IR spectrum represents the percent transmission and the horizontal axis measures frequency (wavenumber).

Accepted Answer

A) True 
 B)False

Question 10

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C5H10O2)?

Accepted Answer

O-H: 3000-3600 cm^-¹
C-...

Question 11

MATCH a structure from the list below to the following IR spectra. Place the letter of the structure in the blank provided.
-_____  Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/

Accepted Answer

A)  
B)  
C)  
D)  
E)  F)

Question 12

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? -1 (strong peak) , but does not have peaks at 3200-3650 or 1000-1250 cm-1?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 13

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C6H14O)?

Accepted Answer

O-H: ~3300 cm^-1
C-H: ~...

Question 14

Which of the following compounds gives a carbonyl bond absorption at the lowest frequency?

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 15

Which of the following compounds gives an infrared spectrum with peaks at 1000-1250 cm-1 (strong) , but does not have peaks at 3200-3650 or 1630-1820 cm-1 (sharp, weak peak) ? -1 (strong) , but does not have peaks at 3200-3650 or 1630-1820 cm-1 (sharp, weak peak) ?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 16

A C=O bond undergoes stretching at a lower frequency than C=C.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-11 in the infrared spectrum?

Accepted Answer

A)  C ≡\equiv≡ C
B)  C=O
C)  C=C
D)  C-H

Question 18

What range of wavelengths corresponds to the infrared region of the electromagnetic spectrum?

Accepted Answer

A)  200-400 nm
B)  400-700 nm
C)  2.5-50  μ\muμ m
D)  2-10 mm

Question 19

Which of the following compounds does not give an infrared spectrum with peak at ~1750 cm-1? -1?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 20

Assume you are carrying out the conversion of 1-bromobutane to 1-butanol. How could you use IR spectroscopy to determine when the reaction is complete?  As the reaction progress the 3400-3640 cm-1IR band should increase in intensity.

Accepted Answer

A) True 
 B)False

Exam 12: Infrared Spectroscopy

What are the units of wavenumber, , in infrared spectroscopy?

Correct AnswerverifiedShow Answer

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C6H14O)?

Correct AnswerverifiedO-H: ~3300 cm-1C-H: ~...View AnswerShow Answer

The vertical axis on an IR spectrum represents the percent transmission and the horizontal axis measures frequency (wavenumber).

Correct AnswerverifiedShow Answer

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C5H10O2)?

Correct AnswerverifiedO-H: 3000-3600 cm-1C-...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-11 in the infrared spectrum?

Correct AnswerverifiedShow Answer

A C=O bond undergoes stretching at a lower frequency than C=C.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Which of the following compounds gives an infrared spectrum with peaks at 3300 cm-1 (sharp peak) and 2150 cm-1 (sharp peak) ?

Correct AnswerverifiedShow Answer

What range of wavelengths corresponds to the infrared region of the electromagnetic spectrum?

Correct AnswerverifiedShow Answer

Which of the following compounds gives a carbonyl bond absorption at the lowest frequency?

Correct AnswerverifiedShow Answer

Assume you are carrying out the conversion of 1-bromobutane to 1-butanol. How could you use IR spectroscopy to determine when the reaction is complete? As the reaction progress the 3400-3640 cm-1IR band should increase in intensity.

Correct AnswerverifiedShow Answer

Which of the following relationships is not valid as applied to infrared spectroscopy?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Examining the infrared spectrum of a compound allows us to determine the nature of the conjugated pi electron system in the compound.

Correct AnswerverifiedShow Answer

MATCH a structure from the list below to the following IR spectra. Place the letter of the structure in the blank provided. -_____ Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/

Correct AnswerverifiedShow Answer

Which of the following compounds gives a carbonyl bond absorption at the highest frequency?

Correct AnswerverifiedShow Answer

Which of the following compounds gives an infrared spectrum with a peak at ~1750 cm-1, but no significant peaks at 3000-3500 cm-1 or 1050-1250 cm-1?

Correct AnswerverifiedShow Answer

The radio wave region of the electromagnetic spectrum would have sufficient energy to produce the following energy transition.

Correct AnswerverifiedShow Answer

Which of the following compounds does not give an infrared spectrum with peak at ~1750 cm-1?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C₆H₁₄O)?

Correct Answer
verified
O-H: ~3300 cm^-1
C-H: ~...
View Answer

Correct Answer
verified

Label three peaks in the following spectrum with the bond that gives rise to them, and identify the functional group that is present in the compound (the compound has a formula of C₅H₁₀O₂)?

Correct Answer
verified
O-H: 3000-3600 cm^-¹
C-...
View Answer

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

Correct Answer
verified

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm^-11 in the infrared spectrum?

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

Which of the following compounds gives an infrared spectrum with peaks at 3300 cm^-¹ (sharp peak) and 2150 cm^-¹ (sharp peak) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Assume you are carrying out the conversion of 1-bromobutane to 1-butanol. How could you use IR spectroscopy to determine when the reaction is complete? As the reaction progress the 3400-3640 cm^-¹IR band should increase in intensity.

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following compounds gives an infrared spectrum with a peak at ~1750 cm^-¹, but no significant peaks at 3000-3500 cm^-¹ or 1050-1250 cm^-¹?

Correct Answer
verified

Correct Answer
verified

Which of the following compounds does not give an infrared spectrum with peak at ~1750 cm^-¹?

Correct Answer
verified