1. Molecules absorb infrared radiation at frequencies that relate to . . . ?

(a) the number of hydrogens in the molecule (c) the stretching and bending of bonds

(b) the rate of collision between molecules (d) the number of atoms in the molecule

2. The term base peak in Mass Spectrometry refers to . . .?

(a) the largest peak in the mass spectrum (c) the smallest peak in the mass spectrum

(b) the baseline peak in the mass spectrum (d) the M+ peak in the mass spectrum

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