@Brian_BH Could you share the rationales for tags outside of QID 403824?
QID: 404135.
Question requires an understanding of NMR peaks, specifically both their relative heights and corresponding underlying origin (m/z value, abundance, etc) in order to be able to appropriately and accurately define the height, and origin, or the base peak in particular, given an example NMR graph.
QID: 401569.
Question requires an understanding of effect of ion concentration on ion peak in mass spectra; specifically an understanding of how pH would affect the signal intensity of given example peaks, m/z ratio in this case particularly. Requires knowing that it is the heaviest ion that will be included in the largest m/z value as well as the implicit understanding that m/z value will change given changing ion concentrations in a variable pH environment.
QID: 401567.
Requires the understanding that it is the heaviest ion that will display in a m/z peak and that, given a particular molecule (and weight) with a proper cationic charge, is most likely to be the candidate for the m/z value displayed in an example NMR spectrum, as well as being able to eliminate other example molecules that either are smaller, or do not carry a charge and thus would not be included. Requires explicit appreciation that the proper answer be the heaviest, and an ion.
QID: 404136.
Question gives a reference value for mass and a series of example molecules and asks to predict the most likely of the given structures to represent a given m/z value. Requires knowing that the m/z value must be mass-appropriate and must be an ion, requiring discrimination of non-ionic potential answer decisions, as well as answer options with unreasonable or inappropriately small masses.
QID: 404058.
Question gives an example NMR graph and asks to pair to the most likely of a series of compounds that matches the given data. Requires explicitly choosing the most mass-appropriate (largest) as well as appropriate ion quality (excluding non-charged answer options) that would best fit, and most be appropriate, given the requisite definition of the m/z value which is the primary identifier given in the graph.
QID: 403928.
Passage gives an example molecule (and weight). Question asks to predict the appropriate m/z value, which requires explicit knowledge that it must correspond to the given mass as well as that it must carry a charge (includes discriminator options that are not ions) in order to be able to successfully answer the question. Potential masses given in answer options are either too small, or nonsensically large, relative to the mass of the given compound.