Question 1

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)   4E) B) and D)
F) C) and D)

Question 2

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

Accepted Answer

A)   alcohol
B)   aldehyde or ketone
C)   ether
D)   esterE) A) and B)
F) C) and D)

Question 3

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)   4E) All of the above
F) B) and D)

Question 4

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-1 in the infrared spectrum?

Accepted Answer

A)   CºC
B)   C=O
C)   C=C
D)   C-HE) C) and D)
F) A) and B)

Question 5

Which of the following bonds gives rise to a strong absorbance at approximately 1630-1820 cm-1 in the infrared spectrum?

Accepted Answer

A)   C=O
B)   C-O
C)   C=C
D)   CºCE) B) and C)
F) B) and D)

Question 6

Which of the following bonds undergoes stretching at the highest frequency?

Accepted Answer

A)   C=O
B)   C-O
C)   C=C
D)   C-CE) None of the above
F) All of the above

Question 7

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

Accepted Answer

A)   alcohol
B)   aldehyde or ketone
C)   ether
D)   esterE) All of the above
F) A) and C)

Question 8

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) None of the above

Question 9

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) A) and B)

Question 10

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

Accepted Answer

A)   wavenumber = 1/l (in cm) 
B)   DE = h n
C)   DE = l n
D)   n = 4.12 Ö(K/m) E) C) and D)
F) B) and D)

Question 11

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)   4E) A) and B)
F) None of the above

Question 12

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?

Accepted Answer

A)   radio waves
B)   ultraviolet
C)   infrared
D)   visibleE) A) and B)
F) All of the above

Question 13

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)   4E) B) and C)
F) A) and D)

Question 14

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and B)
F) None of the above

Question 15

Which of the following compounds gives an infrared spectrum with peaks in the ranges of 3200-3650 (strong, broad) , but does not have peaks at 1630-1820 (strong)  or 1600-1640 cm-1 (medium) ? -1 (medium) ?   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)   4E) A) and D)
F) B) and C)

Question 16

Provide the structure of four compounds with the molecular formula C5H10O which give a strong absorption peak at 1700-1740 cm-1 in the infrared spectrum, but no significant peaks at 1600-1640 cm-1 .

Accepted Answer

Any four o...

Question 17

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) A) and D)

Question 18

How could you distinguish between methyl butanoate and pentanoic acid by infrared spectroscopy?

Accepted Answer

The infrared spectrum of penta...

Question 19

Which of the following bonds undergoes stretching at the highest frequency?

Accepted Answer

A)   O-H
B)   C-H
C)   C=O
D)   CºCE) All of the above
F) B) and C)

Question 20

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and D)
F) All of the above

Exam 12: Infrared Spectroscopy

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How could you distinguish between methyl butanoate and pentanoic acid by infrared spectroscopy?

Correct AnswerverifiedThe infrared spectrum of penta...View AnswerShow Answer

Which of the following bonds undergoes stretching at the highest frequency?

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) , but does not have peaks at 3200-3650 or 1000-1250 cm-1

Correct AnswerverifiedShow Answer

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the highest energy?

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

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

Correct AnswerverifiedShow 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

Provide the structure of four compounds with the molecular formula C5H10O which give a strong absorption peak at 1700-1740 cm-1 in the infrared spectrum, but no significant peaks at 1600-1640 cm-1 .

Correct AnswerverifiedAny four o...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following bonds undergoes stretching at the highest frequency?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following bonds gives rise to a strong absorbance at approximately 1630-1820 cm-1 in the infrared spectrum?

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

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

Correct AnswerverifiedShow Answer

Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm-1 in the infrared spectrum?

Correct AnswerverifiedShow Answer

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

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 peaks in the ranges of 3200-3650 (strong, broad) , but does not have peaks at 1630-1820 (strong) or 1600-1640 cm-1 (medium) ?

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 3200-3650 cm^-1 (strong) , but does not have peaks at 1630-1820 or 1000-1250 cm^-1

Correct Answer
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Correct Answer
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Correct Answer
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The infrared spectrum of penta...
View Answer

Correct Answer
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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

Correct Answer
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Correct Answer
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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
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Correct Answer
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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
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Provide the structure of four compounds with the molecular formula C₅H₁₀O which give a strong absorption peak at 1700-1740 cm^-1 in the infrared spectrum, but no significant peaks at 1600-1640 cm^-1 .

Correct Answer
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Any four o...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Which of the following bonds gives rise to a strong absorbance at approximately 1630-1820 cm^-1 in the infrared spectrum?

Correct Answer
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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
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Correct Answer
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Which of the following bonds gives rise to an absorbance at approximately 2700-3300 cm^-1 in the infrared spectrum?

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

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

Correct Answer
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