Spectroscopy UV-Vis spectroscopy of organic compounds is usually concerned with which electronic transition(s)? σ → σ* none of these n → σ* n → π* and π → π* σ → σ* none of these n → σ* n → π* and π → π* ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Which of the following relationships between absorbance and %transmittance is incorrect? All are correct A = log10 100 / %T A = log10 1 / T A = 2 - log10 %T All are correct A = log10 100 / %T A = log10 1 / T A = 2 - log10 %T 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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Beer's Law states that absorbance is proportional to the log of the concentration of the absorbing species None of these absorbance is proportional to both the path length and concentration of the absorbing species absorbance is equal to P0 / P absorbance is proportional to the log of the concentration of the absorbing species None of these absorbance is proportional to both the path length and concentration of the absorbing species absorbance is equal to P0 / P ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Why must the voltage supplied to a tungsten lamp be very stable? Because if it wasn't, the lamp would bum out Because the lamp will only function at a specific voltage All of these Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage Because if it wasn't, the lamp would bum out Because the lamp will only function at a specific voltage All of these Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance? None of these Because %T is dependant on the power of the incident radiation Because absorbance is proportional to the concentration of the analyte, whereas %T is not Because %T cannot be measured as accurately as absorbance None of these Because %T is dependant on the power of the incident radiation Because absorbance is proportional to the concentration of the analyte, whereas %T is not Because %T cannot be measured as accurately as absorbance ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS