Spectroscopy Molar absorbtivity is the measure of the amount of light absorbed per unit concentration amount of light absorbed per unit length None of these amount of light reflected and absorbed per unit concentration amount of light absorbed per unit concentration amount of light absorbed per unit length None of these amount of light reflected and absorbed per unit concentration ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy UV-Vis spectroscopy of organic compounds is usually concerned with which electronic transition(s)? n → π* and π → π* n → σ* σ → σ* none of these n → π* and π → π* n → σ* σ → σ* none of these ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Which of the following relationships between absorbance and %transmittance is incorrect? A = log10 100 / %T All are correct A = log10 1 / T A = 2 - log10 %T A = log10 100 / %T All are correct A = log10 1 / T A = 2 - log10 %T ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance? Because %T is dependant on the power of the incident radiation Because %T cannot be measured as accurately as absorbance None of these Because absorbance is proportional to the concentration of the analyte, whereas %T is not Because %T is dependant on the power of the incident radiation Because %T cannot be measured as accurately as absorbance None of these Because absorbance is proportional to the concentration of the analyte, whereas %T is not ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Which of the following components of a monochromator is the dispersing element? None of these The entrance slit The collimating lens The diffraction grating None of these The entrance slit The collimating lens The diffraction grating ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy In the past, IR spectra had to be aquired one wavelength at a time, which took a long time. Today quick spectra is due to the the Fourier Transfer Algorithm allows us to scan all frequencies at once absence of broad spectrum of wavelenth light is faster today that it used to be None of these the Fourier Transfer Algorithm allows us to scan all frequencies at once absence of broad spectrum of wavelenth light is faster today that it used to be None of these ANSWER DOWNLOAD EXAMIANS APP
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