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WorksheetsOrganic Chemistry- Mass Spectroscopy, IR & EU Quiz Review
Total questions: 20
Worksheet time: 32mins
What do the peaks on the mass spectrum represent?
anions
mass of positively charged fragments
mass of negatively charged fragments
numbers of electrons
Which of the following is NOT a step in the operation of a mass spectrometer?
Accelerate,
Deflect
Radiate
Ionize
1700 cm-1, and 1200 cm-1. Identify the compound.
A molecule has a broadband at 3200cm-1. The molecule is most likely an...
amide
ester
alcohol
carboxylic acid
The above Mass Spectra of an unknown substance contains an M+ peak of 64 and an M+2 Peak. What is the molecular weight of this substance?
29
49
64
66
The above Mass Spectra of an unknown substance contains an M+ peak of 64 and an M+2 Peak. Which of the following could be the formula for this substance?
CH3CH2Cl
CH3CH2CH2NH2
CH3CH2Br
CH3CH2N2
The above Mass Spectra of an unknown substance contains an M+ peak of 64 and an M+2 Peak. What element do the M/M+2 peaks help us identify the presence of?
Cl
Br
S
N
What is the molecular weight of this compound?
29
87
54
15
Looking at the following Mass Spectra and molecular ion, what element is possibly found in this compound??
Cl
N
Br
S
How many elements of unsaturation are found in progesterone (the molecule above)?
4
5
6
7
In a mass spectrum of a molecule, there is a mass loss of 29 (M-29). Which of the following could correspond to this mass loss?
-CH3
-CH2CH3
-C=O
-N=O
What would be mass of the m/z peak for the following fragment?
29
15
72
91
Which of the following molecular formulas could correspond to the above mass spectrum?
C6H5Br
C6H5Cl
C6H5CH2Br
C6H5CH2Cl
Which of the following fragments could correspond to Peak C?
+CH3
+CH2CH3
+CH2CH2CH3
+CH2CH2CH2CH3
Which of the following fragments could correspond to Peak D?
+CH3
+CH2CH3
+CH2CH2CH3
+CH2CH2CH2CH3
Which of the following molecular formulas could match this mass spectra (above)?
C5H12
C7H16
C10H22
C12H26
The IR spectra of an unknown substance was taken and is shown above. The substance is most likely a(n)...
Ketone
Alcohol
Aldehyde
Ether
The above IR spectra could possibly contain which of the following functional groups?
An ester
A carboxylic acid
An alcohol
A nitrile
How many elements of unsaturation are found in benzephenone, C13H10O2?
4
8
9
How many elements of unsaturation are found in the compound C8H3Cl5?
3
4
5
6
