Infrared Spectroscopy (VCE SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which type of energy in a water molecule has the smallest magnitude?
Which type of energy in a water molecule has the smallest magnitude?
Translational energy
How does bond strength affect IR absorption frequency?
How does bond strength affect IR absorption frequency?
Stronger bonds absorb higher frequency
What is the effect of atomic mass on IR absorption frequency?
What is the effect of atomic mass on IR absorption frequency?
Lighter atoms absorb higher frequency
Why must sample containers be made of NaCl or KBr in IR spectroscopy?
Why must sample containers be made of NaCl or KBr in IR spectroscopy?
They are transparent to IR radiation
What is the purpose of the reference cell in an IR spectrophotometer?
What is the purpose of the reference cell in an IR spectrophotometer?
Accounts for solvent interference
What wavenumber range defines the fingerprint region?
What wavenumber range defines the fingerprint region?
Below 1400
How is wavenumber related to wavelength in IR spectroscopy?
How is wavenumber related to wavelength in IR spectroscopy?
Inversely proportional
What is the characteristic O-H absorption for alcohols?
What is the characteristic O-H absorption for alcohols?
Broad, 3200-3600
How can IR distinguish carboxylic acids from esters?
How can IR distinguish carboxylic acids from esters?
Acids show very broad O-H absorption
What characterizes the C=O absorption band in IR spectra?
What characterizes the C=O absorption band in IR spectra?
Strong and narrow at ~1700