To answer this question, we need the structure or formula of compound X. However, I can provide a general explanation of how functional groups and their absorption frequencies in infrared IR spectroscopy can be used to determine the identity of a compound.Infrared spectroscopy is a technique used to identify functional groups present in a compound by measuring the absorption of infrared radiation at different frequencies. Each functional group has a characteristic absorption frequency or range of frequencies, which corresponds to the energy required to excite the vibrations of the chemical bonds within the group.Some common functional groups and their approximate absorption frequencies in IR spectroscopy are:1. Hydroxyl group O-H : 3200-3600 cm broad 2. Carboxylic acid O-H : 2500-3300 cm broad 3. Amine N-H : 3300-3500 cm4. Alkene C=C : 1620-1680 cm5. Carbonyl C=O : 1680-1750 cm6. Nitrile CN : 2210-2260 cm7. Alkyne CC : 2100-2250 cmTo determine the identity of compound X, you would first obtain its IR spectrum by exposing the compound to infrared radiation and measuring the absorption at different frequencies. Then, you would analyze the spectrum to identify the characteristic absorption peaks corresponding to specific functional groups. By comparing the observed absorption frequencies with the known frequencies for various functional groups, you can deduce which functional groups are present in the compound.Once you have identified the functional groups, you can use this information along with other analytical techniques such as NMR spectroscopy or mass spectrometry to determine the complete structure and identity of compound X.