Question 1

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-H 
A)  CºC 
B)  C=O 
C)  C=C 
D)  C-H

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

Question 3

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

Question 4

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

Accepted Answer

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

Question 5

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)?

Accepted Answer

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

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-C 
A)  C=O 
B)  C-O 
C)  C=C 
D)  C-C

Question 7

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

Accepted Answer

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

Question 8

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)?

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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 11

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

Accepted Answer

A)  O-H 
B)  C-H 
C)  C=O 
D)  CºC 
A)  O-H 
B)  C-H 
C)  C=O 
D)  CºC

Question 12

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

Accepted Answer

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

Question 13

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?

Accepted Answer

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

Question 14

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

Accepted Answer

The infrared spectrum of penta

Question 15

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

Accepted Answer

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

Question 16

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)  visible 
A)  radio waves 
B)  ultraviolet 
C)  infrared 
D)  visible

Question 17

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)  CºC 
A)  C=O 
B)  C-O 
C)  C=C 
D)  CºC

Question 18

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

Question 19

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

Question 20

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?

Accepted Answer

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

Exam 12: Infrared Spectroscopy

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

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

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

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

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)?

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

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

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)?

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

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 .

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

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

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?

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

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

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

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

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

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

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?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Filters

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

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

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

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)?

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)?

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 .

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?

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

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

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?