Question 1

Which of the following is expected to be the base peak in the mass spectrum of 2-methyl-2-butanol?

Accepted Answer

A)   73
B)   55
C)   43
D)   31
E)   59F) A) and D)
G) A) and C)

Question 2

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

Accepted Answer

The two absorptions at 3350cm^-1 ...

Question 3

Which one of the following compounds is consistent with the mass spectrum below? 3CH2CH(CH3) 2 B)  CH3CHOHCH2CH3 C)  CH3CH2OCH2CH3 D)  CH3CH2NHCH2CH3 E)  none of these" class="answers-bank-image d-inline" rel="preload" > SDBS: National Institute of Advanced Industrial Science and Technology

Accepted Answer

A)   CH3CH2CH(CH3) 2
B)   CH3CHOHCH2CH3
C)   CH3CH2OCH2CH3
D)   CH3CH2NHCH2CH3
E)   none of theseF) B) and D)
G) C) and D)

Question 4

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 5

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 & C
E)   none of theseF) A) and B)
G) A) and D)

Question 6

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 & B
E)   all of theseF) A) and D)
G) C) and E)

Question 7

Which of the following compounds have the same degree of unsaturation?

Accepted Answer

A)   I & II
B)   I & III
C)   III & IV
D)   II & III
E)   none of theseF) B) and D)
G) B) and C)

Question 8

Calculate the degree of unsaturation for C5H5Br2NO.

Accepted Answer

A)   4
B)   6
C)   2
D)   3
E)   7F) A) and D)
G) B) and E)

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) B) and E)
G) None of the above

Question 10

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 11

Which of the following bonds has the weakest absorption?

Accepted Answer

A)   C=C
B)   O-H
C)   C=O
D)   sp3C-H
E)   A & DF) A) and E)
G) B) and E)

Question 12

Which of the following electromagnetic radiation has the highest energy?

Accepted Answer

A)   UV
B)   X-ray
C)   IR
D)   microwave
E)   visibleF) A) and D)
G) All of the above

Question 13

Which of the following is not a prominent peak in the mass spectrum of 2-methyl-2-pentanol?

Accepted Answer

A)   (M-15) 
B)   (M-18) 
C)   (M-29) 
D)   (M-16) 
E)   none of theseF) None of the above
G) A) and C)

Question 14

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)   A & B
E)   none of theseF) A) and D)
G) B) and E)

Question 15

Which of the following is true about the (M+1) + . peak on the mass spectrum of a hydrocarbon?

Accepted Answer

A)   it is always the most abundant peak
B)   it is due to the 13C isotope of carbon
C)   it has a m/z value lower than the molecular ion
D)   it is useful in calculating number of carbon atoms
E)   B & DF) C) and D)
G) A) and D)

Question 16

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 & C
E)   none of theseF) A) and B)
G) B) and E)

Question 17

Which one of the following compounds is consistent with the mass spectrum below? 3CH2CH2) 2CH B)  CH3CH2CHOHCH2CH2CH3 C)  (CH3CH2CH2) 2O D)  (CH3CH2CH2) 2NH E)  none of these" class="answers-bank-image d-inline" rel="preload" > SDBS:

Accepted Answer

A)   (CH3CH2CH2) 2CH
B)   CH3CH2CHOHCH2CH2CH3
C)   (CH3CH2CH2) 2O
D)   (CH3CH2CH2) 2NH
E)   none of theseF) A) and E)
G) B) and D)

Question 18

Provide a molecular formula that is consistent with the following mass spectrum data.
M+ .  at m/z= 167, relative height=50.0%
(M+1)+ .  at m/z= 168, relative height=4.4%

Accepted Answer

C<sub>8</s...

Question 19

Which of the m/z values correspond to the molecular ion for the following compound?

Accepted Answer

A)   18
B)   82
C)   100
D)   102
E)   103F) All of the above
G) A) and B)

Question 20

Which one of the following compounds will have the lowest wavenumber for carbonyl absorption?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   none of theseF) A) and B)
G) A) and C)

Exam 15: Infrared Spectroscopy and Mass Spectrometry

Which of the following is not a prominent peak in the mass spectrum of 2-methyl-2-pentanol?

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

Which of the following compounds have the same degree of unsaturation?

Correct AnswerverifiedShow Answer

Which one of the following compounds will have the lowest wavenumber for carbonyl absorption?

Correct AnswerverifiedShow Answer

Which of the following is expected to be the base peak in the mass spectrum of 2-methyl-2-butanol?

Correct AnswerverifiedShow Answer

Provide a molecular formula that is consistent with the following mass spectrum data. M+ . at m/z= 167, relative height=50.0% (M+1)+ . at m/z= 168, relative height=4.4%

Correct AnswerverifiedC8View AnswerShow Answer

Calculate the degree of unsaturation for C5H5Br2NO.

Correct AnswerverifiedShow Answer

Which of the following is true about CH3CH3+ . ?

Correct AnswerverifiedShow Answer

Which of the following electromagnetic radiation has the highest energy?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe two absorptions at 3350cm-1 ...View AnswerShow Answer

Which of the following bonds has the weakest absorption?

Correct AnswerverifiedShow 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

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

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

Which one of the following compounds is consistent with the mass spectrum below? SDBS:

Correct AnswerverifiedShow Answer

Which of the following is true about the (M+1) + . peak on the mass spectrum of a hydrocarbon?

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

Which of the m/z values correspond to the molecular ion for the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Provide a molecular formula that is consistent with the following mass spectrum data. M⁺ ^. at m/z= 167, relative height=50.0% (M+1)⁺ ^. at m/z= 168, relative height=4.4%

Correct Answer
verified
C_{8View Answer}

Calculate the degree of unsaturation for C₅H₅Br₂NO.

Correct Answer
verified

Which of the following is true about CH₃CH₃⁺ ^. ?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
The two absorptions at 3350cm^-1 ...
View Answer

Correct Answer
verified

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

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

Which of the following is true about the (M+1) ⁺ ^. peak on the mass spectrum of a hydrocarbon?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified