Spectroscopy Which of the following components of a monochromator is the dispersing element? The diffraction grating The collimating lens The entrance slit None of these The diffraction grating The collimating lens The entrance slit None of these ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Why must the voltage supplied to a tungsten lamp be very stable? Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage Because the lamp will only function at a specific voltage All of these Because if it wasn't, the lamp would bum out Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage Because the lamp will only function at a specific voltage All of these Because if it wasn't, the lamp would bum out 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 Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance? Because %T cannot be measured as accurately as absorbance Because %T is dependant on the power of the incident radiation None of these Because absorbance is proportional to the concentration of the analyte, whereas %T is not Because %T cannot be measured as accurately as absorbance Because %T is dependant on the power of the incident radiation None of these Because absorbance is proportional to the concentration of the analyte, whereas %T is not ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Where does a carbonyl (C=0) stretch appear in an IR spectrum? 160-110 1870-1650 3640-3250 1740-1720 160-110 1870-1650 3640-3250 1740-1720 ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy A simple harmonic oscillator may absorb energy when the frequencies match exactly at no time. at anytime. when the amplitudes are the same. when the frequencies match exactly at no time. at anytime. when the amplitudes are the same. ANSWER DOWNLOAD EXAMIANS APP
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