Question 1

A compound with molecular formula C3H9N, shows absorptions at 3400 cm-1 (two), 2980 cm-1 and at 1100 cm-1 on the IR spectrum. Propose a possible structure for this compound.

Accepted Answer

CH₃CH₂CH₂NH₂ O...

Question 2

Provide the structure of the major fragment that results when the molecular ion of (CH3)2CHCH2CH2NH2 undergoes fragmentation.

Accepted Answer

Question 3

Which of the following compounds will have absorptions at 1700 cm-1 and 1320 cm-1? -1 and 1320 cm-1?   A)  I B)  II C)  III D)  IV E)  V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) B) and E)
G) C) and D)

Question 4

Which one of the following compounds is consistent with the following IR spectrum?  SDBS: National Institute of Advanced Industrial Science and Technology

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) C) and D)
G) B) and C)

Question 5

For the following reaction, explain how you can use IR spectroscopy to monitor the progress of the reaction.

Accepted Answer

The two absorptions at 3350 cm...

Question 6

Propose a possible structure for a compound with molecular formula C6H5Br.

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30">_TB4454_00...

Question 7

GC-mass spectrometry is used to find the _________ of each compound in a __________.

Accepted Answer

A)   molecular formula, mixture of alkanes
B)   molecular weight, mixture of compounds
C)   molecular formula, mixture of compounds
D)   B and C
E)   none of theseF) A) and B)
G) B) and D)

Question 8

For each of the following IR spectra determine if it is consistent with the structure of an alcohol, a ketone, an aldehyde, a carboxylic acid, a primary amine or a secondary amine.
I.  SDBS: National Institute of Advanced Industrial Science and Technology
II.  SDBS: National Institute of Advanced Industrial Science and Technology

Accepted Answer

I: aldehyd...

Question 9

Which one of the following compounds is consistent with the following IR spectrum?  SDBS: National Institute of Advanced Industrial Science and Technology

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) D) and E)
G) None of the above

Question 10

The separation of ions in the mass spectrometer is done by their ______.

Accepted Answer

A)   electrons to protons ratio
B)   mass to neutrons ratio
C)   protons to neutrons ratio
D)   mass to charge ratio
E)   protons to electrons ratioF) A) and B)
G) B) and E)

Question 11

A compound with molecular formula C6H10O, shows absorptions at 1720 cm-1 and at 2980 cm-1 on the IR spectrum. Propose a possible structure for this compound.

Accepted Answer

Question 12

Which of the following is currently most often used to indicate the location of a signal on an IR spectrum?

Accepted Answer

A)   wavelength
B)   wavenumber
C)   frequency
D)   A and B
E)   all of theseF) A) and B)
G) A) and C)

Question 13

Propose all possible structures for a compound with molecular formula C4H9N that shows two medium absorptions at 3400 cm-1 and no absorption in the range of 1600 - 1800 cm-1 in its IR spectrum.

Accepted Answer

Question 14

Diluted alcohols show a _____absorption around 3600 cm-1, due to _____.

Accepted Answer

A)   sharp, hydrogen bonding
B)   broad, hydrogen bonding
C)   sharp, absence of hydrogen bonding
D)   broad, absence of hydrogen bondingE) B) and D)
F) A) and C)

Question 15

Predict the product for the following reaction and explain how you can use IR spectroscopy to monitor the progress of the reaction.

Accepted Answer

CH₃CH₂CH₂C≡CCH₂CH₂CH₃
Absorptions fo...

Question 16

Which of the following wavenumber corresponds to the carbon/carbon triple bond region on an IR spectrum?

Accepted Answer

A)   1500 - 4000 cm-1
B)   400 - 4000 cm-1
C)   400 - 1500 cm-1
D)   2100 - 2300 cm-1
E)   1600 - 1850 cm-1F) B) and D)
G) C) and D)

Question 17

How will you distinguish between the following compounds using high-resolution mass spectrometry?

Accepted Answer

Compound I: m/z at 1...

Question 18

Which of the following is true about CH3CH3+•?

Accepted Answer

A)   it is the parent ion of ethane
B)   it is a molecular ion of ethane with m/z = 30
C)   it is a fragment of propane
D)   it is a fragment of butane
E)   A and BF) B) and E)
G) B) and D)

Question 19

Arrange the following electromagnetic radiation in decreasing (highest to lowest)  order of wavelength.  III > IV > II > I B)  II > V > III > IV > I C)  I > IV > III > V > II D)  V > II > IV > III > I E)  II > IV > V > III > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   V > III > IV > II > I
B)   II > V > III > IV > I
C)   I > IV > III > V > II
D)   V > II > IV > III > I
E)   II > IV > V > III > IF) A) and C)
G) B) and D)

Question 20

High-resolution mass spectrometry is used to determine the _____ of a compound.

Accepted Answer

A)   degree of unsaturation
B)   molecular formula
C)   molecular weight
D)   B and C
E)   none of theseF) A) and D)
G) A) and C)

Exam 14: Infrared Spectroscopy and Mass Spectrometry

For the following reaction, explain how you can use IR spectroscopy to monitor the progress of the reaction.

Correct Answer
verified
The two absorptions at 3350 cm...
View Answer

Provide the structure of the major fragment that results when the molecular ion of (CH₃)₂CHCH₂CH₂NH₂ undergoes fragmentation.

Correct Answer
verified

Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology

Correct Answer
verified

A compound with molecular formula C₃H₉N, shows absorptions at 3400 cm^-1 (two), 2980 cm^-1 and at 1100 cm^-1 on the IR spectrum. Propose a possible structure for this compound.

Correct Answer
verified
CH₃CH₂CH₂NH₂ O...
View Answer

Correct Answer
verified
I: aldehyd...
View Answer

A compound with molecular formula C₆H₁₀O, shows absorptions at 1720 cm^-1 and at 2980 cm^-1 on the IR spectrum. Propose a possible structure for this compound.

Correct Answer
verified

Which of the following is true about CH₃CH₃⁺•?

Correct Answer
verified

Which of the following wavenumber corresponds to the carbon/carbon triple bond region on an IR spectrum?

Correct Answer
verified

High-resolution mass spectrometry is used to determine the _____ of a compound.

Correct Answer
verified

The separation of ions in the mass spectrometer is done by their ______.

Correct Answer
verified

Propose all possible structures for a compound with molecular formula C₄H₉N that shows two medium absorptions at 3400 cm^-1 and no absorption in the range of 1600 - 1800 cm^-1 in its IR spectrum.

Correct Answer
verified

Which of the following compounds will have absorptions at 1700 cm^-1 and 1320 cm^-1?

Correct Answer
verified

Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology

Correct Answer
verified

Propose a possible structure for a compound with molecular formula C₆H₅Br.

Correct Answer
verified
_TB4454_00...
View Answer

How will you distinguish between the following compounds using high-resolution mass spectrometry?

Correct Answer
verified
Compound I: m/z at 1...
View Answer

GC-mass spectrometry is used to find the _ of each compound in a __.

Correct Answer
verified

Which of the following is currently most often used to indicate the location of a signal on an IR spectrum?

Correct Answer
verified

Predict the product for the following reaction and explain how you can use IR spectroscopy to monitor the progress of the reaction.

Correct Answer
verified
CH₃CH₂CH₂C≡CCH₂CH₂CH₃
Absorptions fo...
View Answer

Diluted alcohols show a _absorption around 3600 cm^-1, due to _.

Correct Answer
verified

Arrange the following electromagnetic radiation in decreasing (highest to lowest) order of wavelength.

Correct Answer
verified

Exam 14: Infrared Spectroscopy and Mass Spectrometry

For the following reaction, explain how you can use IR spectroscopy to monitor the progress of the reaction.

Correct AnswerverifiedThe two absorptions at 3350 cm...View AnswerShow Answer

Provide the structure of the major fragment that results when the molecular ion of (CH3)2CHCH2CH2NH2 undergoes fragmentation.

Correct AnswerverifiedShow Answer

Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology

Correct AnswerverifiedShow Answer

A compound with molecular formula C3H9N, shows absorptions at 3400 cm-1 (two), 2980 cm-1 and at 1100 cm-1 on the IR spectrum. Propose a possible structure for this compound.

Correct AnswerverifiedCH3CH2CH2NH2 O...View AnswerShow Answer

Correct AnswerverifiedI: aldehyd...View AnswerShow Answer

A compound with molecular formula C6H10O, shows absorptions at 1720 cm-1 and at 2980 cm-1 on the IR spectrum. Propose a possible structure for this compound.

Correct AnswerverifiedShow Answer

Which of the following is true about CH3CH3+•?

Correct AnswerverifiedShow Answer

Which of the following wavenumber corresponds to the carbon/carbon triple bond region on an IR spectrum?

Correct AnswerverifiedShow Answer

High-resolution mass spectrometry is used to determine the _____ of a compound.

Correct AnswerverifiedShow Answer

The separation of ions in the mass spectrometer is done by their ______.

Correct AnswerverifiedShow Answer

Propose all possible structures for a compound with molecular formula C4H9N that shows two medium absorptions at 3400 cm-1 and no absorption in the range of 1600 - 1800 cm-1 in its IR spectrum.

Correct AnswerverifiedShow Answer

Which of the following compounds will have absorptions at 1700 cm-1 and 1320 cm-1?

Correct AnswerverifiedShow Answer

Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology

Correct AnswerverifiedShow Answer

Propose a possible structure for a compound with molecular formula C6H5Br.

Correct Answerverified_TB4454_00...View AnswerShow Answer

How will you distinguish between the following compounds using high-resolution mass spectrometry?

Correct AnswerverifiedCompound I: m/z at 1...View AnswerShow Answer

GC-mass spectrometry is used to find the _________ of each compound in a __________.

Correct AnswerverifiedShow Answer

Which of the following is currently most often used to indicate the location of a signal on an IR spectrum?

Correct AnswerverifiedShow Answer

Predict the product for the following reaction and explain how you can use IR spectroscopy to monitor the progress of the reaction.

Correct AnswerverifiedCH3CH2CH2C≡CCH2CH2CH3Absorptions fo...View AnswerShow Answer

Diluted alcohols show a _____absorption around 3600 cm-1, due to _____.

Correct AnswerverifiedShow Answer

Arrange the following electromagnetic radiation in decreasing (highest to lowest) order of wavelength.

Correct AnswerverifiedShow Answer

Correct Answer
verified
The two absorptions at 3350 cm...
View Answer

Provide the structure of the major fragment that results when the molecular ion of (CH₃)₂CHCH₂CH₂NH₂ undergoes fragmentation.

Correct Answer
verified

Correct Answer
verified

A compound with molecular formula C₃H₉N, shows absorptions at 3400 cm^-1 (two), 2980 cm^-1 and at 1100 cm^-1 on the IR spectrum. Propose a possible structure for this compound.

Correct Answer
verified
CH₃CH₂CH₂NH₂ O...
View Answer

Correct Answer
verified
I: aldehyd...
View Answer

A compound with molecular formula C₆H₁₀O, shows absorptions at 1720 cm^-1 and at 2980 cm^-1 on the IR spectrum. Propose a possible structure for this compound.

Correct Answer
verified

Which of the following is true about CH₃CH₃⁺•?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Propose all possible structures for a compound with molecular formula C₄H₉N that shows two medium absorptions at 3400 cm^-1 and no absorption in the range of 1600 - 1800 cm^-1 in its IR spectrum.

Correct Answer
verified

Which of the following compounds will have absorptions at 1700 cm^-1 and 1320 cm^-1?

Correct Answer
verified

Correct Answer
verified

Propose a possible structure for a compound with molecular formula C₆H₅Br.

Correct Answer
verified
_TB4454_00...
View Answer

Correct Answer
verified
Compound I: m/z at 1...
View Answer

GC-mass spectrometry is used to find the _ of each compound in a __.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
CH₃CH₂CH₂C≡CCH₂CH₂CH₃
Absorptions fo...
View Answer

Diluted alcohols show a _absorption around 3600 cm^-1, due to _.

Correct Answer
verified

Correct Answer
verified