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WorksheetsUV Visible spectroscopy
Total questions: 10
Worksheet time: 8mins
Beer's Law states that;
Absorbance is proportional to both the path length and concentration of the absorbing species
Absorbance is proportional to the log of the concentration of the absorbing species
Absorbance is equal to P0 / P
None of the above
Molar absorbtivities of compounds exhibiting charge transfer absorption are
Small
Moderate
Large
What is the wavelength range for UV spectrum of light?
400 nm – 700 nm
700 nm to 1 mm
0.01 nm to 10 nm
10 nm to 400 nm
Which of the following statements is true concerning infrared spectroscopy?
IR spectroscopy is useful in determining the size and shape of a compound's carbon skeleton.
An IR spectrometer shines infrared light on a compound and records the positions where the light is blocked by the compound. This results in the spectrum's peaks.
When the infrared light frequency matches the frequency of bond vibration in a molecule, a peak is recorded on the spectrum.
Functional groups can be identified by looking in the fingerprint region of the spectrum.
In IR spectroscopy, the vibration between atoms is caused by which of the following?
The number of protons in a nucleus
The movement of electrons to higher energy levels
The overall molecular weight of the molecule
Dipole moments between atoms
An alcohol group in a compound would result in a broad dip around what part of the infrared (IR) spectrum?
1700cm-1
3400cm-1
1200cm-1
2800cm-1
An unknown compound is analyzed using infrared spectroscopy. A strong, sharp peak is observed at a frequency of 1750cm-1. What functional group is present?
Alcohol
Unsaturated ketone
Ester
Saturated ketone
Nuclear magnetic resonance (NMR) uses which electromagnetic wave to analyze material?
Radiowaves
Infrared
Microwaves
X-rays
(a) is a chromophore
What is an auxochrome?
