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Please also tell me why you picked the your answer. Show any sources used.

Read the statements below referring to^1H-NMR. Which ONE statement is NOT correct? The extent of the direct spin-spin interaction diminishes with distance. Microwaves are the type of radiation used to obtain NMR spectra. The chemical shift can depend upon the electronegativity of the atom to which the proton is chemically attached. The relaxation time is the time taken to dissipate the excess spin energy. The intensity of the signals obtained in mass spectrometry depends on several factors. Among the factors given below, chose the ONE that does NOT affect the intensity of the spectral lines. Stability of the ion generated. Sensitivity of the detector. Temperature in the analyser. Type of ionisation. Given the molecule 2-pentanone, which ONE of the following can originate from it by electron impact ionisation? [2-propenol]^+ and through a rearrangement. [acetaldehyde]^+-and propane. Propane and ethanol. Pentane and water. Which ONE of the following are examples of spectroscopic signals Emission, resonance and fluorescence. Emission, absorption and fluorescence. Resonance, absorption and fluorescence. Emission, absorption and resonance.

Explanation / Answer

14. All the statements are correct except (B)

Radio waves are used in NMR spectroscopy.

Therefore option (B) is correct

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