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Practice Questions for Mass Spectrometry

Question 1:
Which of the following compounds will give a molecular ion having m/z = an odd number?

    CH3CH2OH
    CH2BrCl
    CH3CO2H
    CH3CH2NH2
    (CH3)2NCH2C≡N

Question 2:
What class of compounds is most likely to give a fragment ion at m/z = M-18?

    alkenes
    cycloalkanes
    alcohols
    alkyl iodides
    benzene derivatives

Question 3:
Which of the following compounds is most likely to have its base peak at m/z = 43?

    CH3(CH2)4CH3
    (CH3)3CCH2CH3
    cyclohexane
    (CH3)2CHCH(CH3)2
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