Question 1

Cyclohexene and hex-2-yne both have the molecular formula, C6H10. The mass spectrum below belongs to ___________________.

Accepted Answer

cyclohexen...

Question 2

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s).  Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/
-The peak at a m/z of _____ represents the following species. $\mathrm{CH}_{3} \stackrel{+}{\mathrm{C}} \mathrm{HCH}_{2} \mathrm{CH}_{3}$

Accepted Answer

The answer of Refer to the mass spectrum of 2-methylbutane...

Question 3

In mass spectrometry, which of the following phrases is shortened to the acronym "MALDI"?

Accepted Answer

A)   mass analysis by light-detected ions
B)   matrix assisted laser desorption ionization
C)   many atom loss-detecting ionization
D)   molecular and light detecting instrumentE) C) and D)
F) A) and B)

Question 4

Identify a basic function of a mass spectrometer.

Accepted Answer

A)   It separates molecules according to their functional groups.
B)   It measures only the abundance of isotopes present in molecules.
C)   It converts neutral molecules into positively or negatively charged ions.
D)   It separates ions according to their molecular masses.E) A) and C)
F) B) and C)

Question 5

Which of the following sets of molecular ions does an alkyl chloride possess?

Accepted Answer

A)   two molecular ions in a 2:1 ratio separated by two mass units
B)   two molecular ions in a 1:1 ratio separated by two mass units
C)   three molecular ions in a 1:2:1 ratio separated by two mass units
D)   two molecular ions in a 3:1 ratio separated by two mass unitsE) B) and D)
F) A) and B)

Question 6

Which of the molecules gives rise to a molecular ion with an odd value of m/z?

Accepted Answer

A)   C6H12O2
B)   C7H10ClN
C)   C8H18N2
D)   C8H12E) A) and D)
F) All of the above

Question 7

Which C5H12O compound give the following EI mass spectrum?

Accepted Answer

Question 8

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s).  Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/
-The peak at a m/z of _____ represents the following species.
+CH2CH3

Accepted Answer

Question 9

Which C6H12O carbonyl-containing compound shows a molecular ion peak at m/z 100 and significant fragment peaks at m/z 71, 58, 57, 43 and 29 in the EI mass spectrum?

Accepted Answer

Question 10

The mass spectrum of 1-pentanol shows an intense daughter ion peak at m/z = 31. This peak could be due to the formation of CH3O+.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is not prominent in the mass spectrum of 2-methyl-2-butanol?

Accepted Answer

A)   M − 15
B)   M − 18
C)   M − 21
D)   M − 29E) C) and D)
F) B) and D)

Question 12

Which of the following is the definition of the base peak of a mass spectrum?

Accepted Answer

A)   the peak corresponding to the most abundant ion
B)   the peak corresponding to the ion with lowest m/e
C)   the peak corresponding to the molecular ion peak
D)   the peak corresponding to the ion arising to loss of a proton from the molecular ionE) B) and D)
F) None of the above

Question 13

Both mass spectrometry and infrared spectroscopy involve the interaction of molecules with electromagnetic energy.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following gives rise to a prominent peak in the mass spectrum with m/z of 91?

Accepted Answer

A)   1-octene
B)   1-hexanamine, CH3CH2CH2CH2CH2CH2NH2
C)   benzene
D)   ethylbenzeneE) A) and D)
F) A) and C)

Question 15

Which of the following gives rise to a prominent M − 15 peak in the mass spectrum?

Accepted Answer

A)   cyclopentane
B)   cyclopentene
C)   cyclopentanol
D)   methylcyclopentaneE) A) and D)
F) All of the above

Exam 14: Mass Spectrometry

Which of the following gives rise to a prominent peak in the mass spectrum with m/z of 91?

Correct Answer
verified

Identify a basic function of a mass spectrometer.

Correct Answer
verified

Which C₆H₁₂O carbonyl-containing compound shows a molecular ion peak at m/z 100 and significant fragment peaks at m/z 71, 58, 57, 43 and 29 in the EI mass spectrum?

Correct Answer
verified

Which C₅H₁₂O compound give the following EI mass spectrum?

Correct Answer
verified

Which of the following is not prominent in the mass spectrum of 2-methyl-2-butanol?

Correct Answer
verified

Both mass spectrometry and infrared spectroscopy involve the interaction of molecules with electromagnetic energy.

Correct Answer
verified

In mass spectrometry, which of the following phrases is shortened to the acronym "MALDI"?

Correct Answer
verified

Which of the following is the definition of the base peak of a mass spectrum?

Correct Answer
verified

The mass spectrum of 1-pentanol shows an intense daughter ion peak at m/z = 31. This peak could be due to the formation of CH₃O⁺.

Correct Answer
verified

Which of the molecules gives rise to a molecular ion with an odd value of m/z?

Correct Answer
verified

Correct Answer
verified

Which of the following gives rise to a prominent M − 15 peak in the mass spectrum?

Correct Answer
verified

Which of the following sets of molecular ions does an alkyl chloride possess?

Correct Answer
verified

Cyclohexene and hex-2-yne both have the molecular formula, C₆H₁₀. The mass spectrum below belongs to ___________________.

Correct Answer
verified
cyclohexen...
View Answer

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -The peak at a m/z of _____ represents the following species. +CH₂CH₃

Correct Answer
verified

Exam 14: Mass Spectrometry

Which of the following gives rise to a prominent peak in the mass spectrum with m/z of 91?

Correct AnswerverifiedShow Answer

Identify a basic function of a mass spectrometer.

Correct AnswerverifiedShow Answer

Which C6H12O carbonyl-containing compound shows a molecular ion peak at m/z 100 and significant fragment peaks at m/z 71, 58, 57, 43 and 29 in the EI mass spectrum?

Correct AnswerverifiedShow Answer

Which C5H12O compound give the following EI mass spectrum?

Correct AnswerverifiedShow Answer

Which of the following is not prominent in the mass spectrum of 2-methyl-2-butanol?

Correct AnswerverifiedShow Answer

Both mass spectrometry and infrared spectroscopy involve the interaction of molecules with electromagnetic energy.

Correct AnswerverifiedShow Answer

In mass spectrometry, which of the following phrases is shortened to the acronym "MALDI"?

Correct AnswerverifiedShow Answer

Which of the following is the definition of the base peak of a mass spectrum?

Correct AnswerverifiedShow Answer

The mass spectrum of 1-pentanol shows an intense daughter ion peak at m/z = 31. This peak could be due to the formation of CH3O+.

Correct AnswerverifiedShow Answer

Which of the molecules gives rise to a molecular ion with an odd value of m/z?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following gives rise to a prominent M − 15 peak in the mass spectrum?

Correct AnswerverifiedShow Answer

Which of the following sets of molecular ions does an alkyl chloride possess?

Correct AnswerverifiedShow Answer

Cyclohexene and hex-2-yne both have the molecular formula, C6H10. The mass spectrum below belongs to ___________________.

Correct Answerverifiedcyclohexen...View AnswerShow Answer

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -The peak at a m/z of _____ represents the following species. +CH2CH3

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Which C₆H₁₂O carbonyl-containing compound shows a molecular ion peak at m/z 100 and significant fragment peaks at m/z 71, 58, 57, 43 and 29 in the EI mass spectrum?

Correct Answer
verified

Which C₅H₁₂O compound give the following EI mass spectrum?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The mass spectrum of 1-pentanol shows an intense daughter ion peak at m/z = 31. This peak could be due to the formation of CH₃O⁺.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Cyclohexene and hex-2-yne both have the molecular formula, C₆H₁₀. The mass spectrum below belongs to ___________________.

Correct Answer
verified
cyclohexen...
View Answer

Refer to the mass spectrum of 2-methylbutane shown below to answer the following question(s). Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ -The peak at a m/z of _____ represents the following species. +CH₂CH₃

Correct Answer
verified