Q. In FTIR spectroscopy, what is the purpose of the interferometer?
A.
To amplify signals
B.
To separate wavelengths
C.
To create an interference pattern
D.
To cool samples
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Solution
The interferometer in FTIR spectroscopy creates an interference pattern that is used to obtain the spectrum of the sample.
Correct Answer:
C
— To create an interference pattern
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Q. What does FTIR stand for in the context of spectroscopy?
A.
Fourier Transform Infrared
B.
Frequency Time Infrared
C.
Fast Time Infrared
D.
Fourier Time Infrared
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Solution
FTIR stands for Fourier Transform Infrared spectroscopy, a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas.
Correct Answer:
A
— Fourier Transform Infrared
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Q. What is the typical range of wavelengths measured in FTIR spectroscopy?
A.
100-400 nm
B.
400-700 nm
C.
4000-400 cm-1
D.
700-1000 nm
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Solution
FTIR spectroscopy typically measures wavelengths in the range of 4000-400 cm-1, corresponding to infrared light.
Correct Answer:
C
— 4000-400 cm-1
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Q. What type of information can FTIR spectroscopy provide about a sample?
A.
Molecular weight
B.
Chemical structure
C.
Color properties
D.
Electrical conductivity
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Solution
FTIR spectroscopy provides information about the chemical structure of a sample by identifying functional groups and molecular bonds.
Correct Answer:
B
— Chemical structure
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Q. What type of molecular vibrations can FTIR spectroscopy detect?
A.
Rotational
B.
Translational
C.
Vibrational
D.
Electronic
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Solution
FTIR spectroscopy detects vibrational molecular motions, which occur when bonds between atoms stretch or bend.
Correct Answer:
C
— Vibrational
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Q. Which component of FTIR spectroscopy is responsible for detecting the infrared light?
A.
Laser
B.
Photodetector
C.
Sample holder
D.
Computer
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Solution
The photodetector is responsible for detecting the infrared light after it interacts with the sample in FTIR spectroscopy.
Correct Answer:
B
— Photodetector
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Q. Which of the following is a limitation of FTIR spectroscopy?
A.
High sensitivity to moisture
B.
Inability to analyze organic compounds
C.
Requires large sample sizes
D.
Only works at low temperatures
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Solution
A limitation of FTIR spectroscopy is its high sensitivity to moisture, which can interfere with the analysis of samples.
Correct Answer:
A
— High sensitivity to moisture
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Q. Which of the following is a primary application of FTIR spectroscopy in medicine?
A.
Blood glucose monitoring
B.
Tissue characterization
C.
X-ray imaging
D.
Ultrasound diagnostics
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Solution
FTIR spectroscopy is primarily used for tissue characterization, helping to identify chemical compositions and structures in biological samples.
Correct Answer:
B
— Tissue characterization
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Q. Which type of sample can be analyzed using FTIR spectroscopy?
A.
Only solids
B.
Only liquids
C.
Only gases
D.
Solids, liquids, and gases
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Solution
FTIR spectroscopy can analyze solids, liquids, and gases, making it a versatile tool in various fields, including medicine.
Correct Answer:
D
— Solids, liquids, and gases
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