CY110_ Forensic Science Chapter 5 Quiz
Question 1
10 / 10 pts
Paint chips, plastics and fibers can be analyzed using which chromatographic process?
HPLC
Correct!
Pyrolysis GC
TLC
GC
LC-MS
Question 2
10 / 10 pts
Thin-layer chromatography was performed and four spots were visualized on the glass slide. The substance with which R value was least soluble in the stationary phase?
R value .7
Correct!
R value .2
R value .5
R value 8.5
R value 10.0
Question 3
10 / 10 pts
The periodic table is a:
forensic text table of contents.
forensic newsletter issued periodically.
special laboratory surface for multiphase experiments.
Correct!
chart listing by name and symbol of all the known elements.
summary of the order of analyses undertaken in a forensic investigation.
Question 4
10 / 10 pts
The details of the pattern of an infrared (IR) spectrograph are ________ the details of an ultraviolet (UV) spectrograph.
the same as
less than
Correct!
greater than
Question 5
10 / 10 pts
Which chromatographic process would be LEAST likely to be utilized in the crime lab?
GC
TLC
HPLC
Correct!
paper chromatography
none, all are used with equal frequency
Question 6
10 / 10 pts
Organic chemistry is the study of compounds based on:
Correct!
carbon.
hydrogen.
nitrogen.
oxygen.
silicon.
Question 7
10 / 10 pts
Sublimation is defined as a change of state from:
gas to liquid.
liquid to solid.
solid to liquid.
Correct!
solid to gas.
liquid to gas.
Question 8
10 / 10 pts
Gas chromatography suffers a big drawback in that it does not produce specific identification. This problem is overcome by connecting the GC to a:
GRIM 3.
Correct!
MS.
HPLC.
TLC.
computer.
Question 9
10 / 10 pts
A qualitative test will reveal the:
usefulness of the compound.
amount of the sample.
Correct!
identity of a material.
purity of the substance.
density of a compound.
Question 10
10 / 10 pts
Chromatography is NOT used to:
aid in analysis of illicit drug preparations.
separate organic molecules in a mixture.
Correct!
determine colors of an organic compound.
tentatively identify organic molecules.
purify substances.
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