These questions cover what school trial papers ask about organic analysis again and again: chemical tests, the stages of a mass spectrometer, molecular ions, fragments and isotope peaks, infrared absorptions, counting ¹³C and ¹H environments, peak areas and n + 1 splitting, empirical and molecular formulas, and combining all the data to identify an unknown. Use the data sheet ranges: O−H (alcohol) 3230 to 3550 cm⁻¹, O−H (acid) 2500 to 3000 cm⁻¹, C=O 1680 to 1750 cm⁻¹; ¹³C: C=O (aldehyde or ketone) 190 to 220 ppm, C=O (acid or ester) 160 to 185 ppm, C−O 50 to 90 ppm. They start easy and get harder. Stuck? Tap Show a hint for one step at a time.
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