
Quiz on Polymer Molecular Weight Determination

Quiz
•
Chemistry
•
University
•
Hard
D20221103338 ALFIRAH BINTI AHMAD
Used 4+ times
FREE Resource
29 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary method for determining polymer molecular weight?
Osmotic pressure
Mass spectrometry
End-group analysis
Viscometry
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a secondary method for determining molecular weight?
Ultracentrifugation
Light scattering
End-group analysis
Gel permeation chromatography
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the limitation of end-group analysis?
Cannot measure molecular weight
Requires expensive apparatus
Limited to linear polymers
Only applicable to branched polymers
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the preferred range for measuring molecular weight using end-group analysis?
20,000 – 50,000 g/mol
1,000 – 5,000 g/mol
5,000 – 10,000 g/mol
10,000 – 20,000 g/mol
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used to measure osmotic pressure?
Viscometry
Cryoscopy
Titration
Membrane osmometry
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the van’t Hoff equation used for?
Calculating boiling point elevation
Determining osmotic pressure
Measuring freezing point depression
Calculating vapor pressure lowering
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main error in osmotic pressure measurements?
High molecular weight species diffusing
Low molecular weight species diffusing
Inaccurate concentration measurements
Temperature fluctuations
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