Spectroscopy UV-Vis spectroscopy of organic compounds is usually concerned with which electronic transition(s)? none of these n → π* and π → π* σ → σ* n → σ* none of these n → π* and π → π* σ → σ* n → σ* 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 Because absorbance is proportional to the concentration of the analyte, whereas %T is not None of these Because %T is dependant on the power of the incident radiation Because %T cannot be measured as accurately as absorbance Because absorbance is proportional to the concentration of the analyte, whereas %T is not None of these ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Which of the following relationships between absorbance and %transmittance is incorrect? A = log10 1 / T All are correct A = log10 100 / %T A = 2 - log10 %T A = log10 1 / T All are correct A = log10 100 / %T A = 2 - log10 %T ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Molar absorbtivity is the measure of the amount of light absorbed per unit length None of these amount of light absorbed per unit concentration amount of light reflected and absorbed per unit concentration amount of light absorbed per unit length None of these amount of light absorbed per unit concentration amount of light reflected and absorbed per unit concentration ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy A simple harmonic oscillator may absorb energy when the frequencies match exactly when the amplitudes are the same. at no time. at anytime. when the frequencies match exactly when the amplitudes are the same. at no time. at anytime. ANSWER DOWNLOAD EXAMIANS APP
Spectroscopy Which of the following is not an IR vibrational mode? Rolling Stretching Scissoring Rocking Rolling Stretching Scissoring Rocking ANSWER DOWNLOAD EXAMIANS APP
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