List of top Chemistry Questions on Spectroscopy asked in CPET

The IR spectrum of water shows three bands. How many bands do you predict for CO2 (a linear triatomic molecule)?

The most convenient spectroscopic technique to establish the presence of intermolecular hydrogen bonding is:

In the IR spectrum, the absorption band due to the carbonyl group in phenyl acetate appears at:

The 1H NMR spectrum of a mixture of benzene and acetonitrile shows two singlets of equal integration. Given that benzene has 6 equivalent protons and acetonitrile (CH3CN) has 3 equivalent protons, the molar ratio of benzene to acetonitrile is: