Welcome to the Quiz!
This quiz contains 11 questions from a mix of 1 subtopics.
What is the fingerprint region in an infrared spectrum?
the section from 1,500 - 2,500 cm-1
the section from 3,500 - 4,500 cm-1
the section from 500 - 1,500 cm-1
the section from 2,500 - 3,500 cm-1
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Which of the following greenhouse gases absorbs infrared radiation through its C=O bond?
nitrous oxide
carbon dioxide
water vapor
methane
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Which of the following statements about the greenhouse effect is true?
greenhouse gases absorb incoming solar radiation
the greenhouse effect is not influenced by human activities
rising greenhouse gas levels reduce the greenhouse effect
greenhouse gases re-radiate some heat back to Earth
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Which of the following is NOT a use of infrared spectroscopy?
measuring the speed of light
breathalyser tests
identifying unknown compounds
atmospheric monitoring
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In a breathalyser test, which peak intensity indicates the amount of ethanol present?
C=O
C-H
N-H
O-H
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What does an increase in peak intensities for CO and NO in atmospheric monitoring indicate?
decreased pollutant levels from car emissions and industrial processes
increased oxygen levels
increased pollutant levels from car emissions and industrial processes
decreased greenhouse gas levels
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Which of the following statements about infrared spectroscopy and global warming is true?
infrared spectroscopy cannot be used to measure changing greenhouse gas concentrations over time
infrared spectroscopy studies provide data demonstrating human activity is increasing the greenhouse effect
infrared spectroscopy studies show that human activity has no impact on the greenhouse effect
infrared spectroscopy studies indicate that global temperatures are decreasing
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Which of the following bonds is associated with the greenhouse gas methane?
C=O
C-H
O-H
N-H
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What happens when the frequency of infrared radiation matches the natural frequency of a covalent bond?
the bond is unaffected by the radiation
the bond absorbs the radiation
the bond emits the radiation
the bond reflects the radiation
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Which of the following statements about the fingerprint region is true?
it produces a pattern unique to each different molecule
it cannot be used to check compound purity
it is not useful for identifying unknown compounds
it is the same for all molecules
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Infrared spectroscopy takes advantage of the fact that bonds in molecules can vibrate at specific natural frequencies.
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