Answer:
There is no structure, it depends on what the product contains
Step-by-step explanation:
In considering a spectroscopic method of identifying a product, if the compound has hydrogen atom then the proton NMR is considered because it contains a nuclear spin.
on the other hand, if it contains carbon, whether Quaternary carbon, tertiary carbon or secondary carbon, then definitely carbon-13 NMR will be considered. and if the compound has a functional group and the group absorbs IR with a particular frequency, then IR will be used in characterizing the compound..
but if the compound when bombarded gives species of radical ion, then Mass spectroscopy will be used in identifying such compound