Mass Spectra Interpretation: HALIDES


No. of Questions= 6

ELECTRON IMPACT MASS SPECTROMETRY PRODUCED THE SPECTRA BELOW. MANY PEAKS ARE LABELLED TO AID INTERPRETATION: M/Z (RELATIVE ABUNDANCE).

LOOK AT THE HINTS AND FOLLOW THE WEB REFERENCE LINK FOR HELP. YOU WILL NEED A PERIODIC TABLE, A TABLE OF COMMON ISOTOPES (WHICH YOU CAN FIND IN THE WEB REFERENCE), A CALCULATOR, AND SCRATCH PAPER TO WORK THIS QUIZ.


1 1. The mass of an atom is listed in the periodic table as an average of its isotopes. For example, chlorine has two isotopes, (35)Cl and (37)Cl, but is listed as having an atomic mass of 35.45. In a mass spectrometer the actual isotopes are observed in their natural abundances. What molecular ion peak(s) would you observe in the mass spectrum of ethyl chloride (CH3CH2Cl)?
      Web Reference      
a) 64
b) 65
c) 66
d) 64 & 65
e) 64 & 66
2 Choose the compound that this spectrum represents.
      Web Reference      
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a) chloromethane
b) difluoromethane
c) methylene chloride
d) hydrogen chloride
e) difluoroamine
3 Choose the compound that this spectrum represents.
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a) bromoethane
b) 1,4-dichloro-2-butene
c) 1-bromopropane
d) 2-bromopropane
e) methyl iodide
4 Choose the compound that this spectrum represents.
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a) methyl iodide
b) 3-bromo-cyclohexene
c) iodoethane
d) 2-bromo-1-chloropropane
e) bromo-benzene
5 Choose the compound that this spectrum represents.
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a) chloromethane
b) 2-chloro-1,3-butadiene
c) dichlorine monoxide
d) trifluoroethane
e) methylene chloride
6 Choose the compound that this spectrum represents.
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a) 2-bromo-1-chloro propane
b) trichloromonofluoromethane
c) 1-bromobutane
d) 1-bromopropane
e) 1-chloro-4-ethynyl-benzene





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